Study: both men and women with greater upper body strength reported having more sexual partners, defying traditional evolutionary theories. While men’s strength has been linked to mate competition and resource provision, the reasons behind women’s strength and mating success remain unclear.

When it comes to love, opposites don't usually attract. Research finds that for between 82-89% of traits analyzed—ranging from political leanings to age of first intercourse to substance use habits—partners were more likely than not to be similar.

Duty Sex—the act of engaging in sex out of a sense of duty or obligation to a partner—is a commonly reported reason why women have sex, with studies indicating associations between Duty Sex and sexual dysfunction, as well as a history of nonconsensual sexual experiences.

A consistent 2-3% of adults say they don't have sexual fantasies. Some of these individuals may have aphantasia (an inability to visualize mental imagery). However, others may not be honest about it due to sexual shame. And some may just have an entirely different understanding of what a fantasy is.

Study: 6 ways to cultivate a thriving marriage: 1. Emotional gestures - being present. 2. Material gestures - thoughtful gifts, love notes, surprise dates. 3. Respecting personal space. 4. Prioritizing physical intimacy. 5. Engaging in shared activities. 6. Helping partner’s friends and family.

The State of Sex Education in the USA in 2025: Currently, only 27 states require sex ed, only 11 mandate instruction around sexual consent, and 33 require that abstinence is stressed whenever sex ed is taught. Even in states that require sex ed, some do not require it to be medically accurate.

Study: men with "low mate value" (i.e., feeling like you have lower desirability as a romantic/sexual partner compared to the person you're in a relationship with) feel more motivated to sexually satisfy their female partners, and this motivation translates into increased cunnilingus frequency.

Attractiveness and kindness are two things people frequently misread as romantic chemistry. While the effects on the brain are similar, they should not be confused with chemistry.

Is BDSM/kink a hobby or a sexual orientation? There's research consistent with both perspectives, which suggests that the answer might be different for different people.

Some people experience inconsistency between their sexual identity or attraction and the type of partnership they are in. Research finds that having this inconsistency is linked to lower relationship satisfaction, particularly for men.

Men are more likely than women to exhibit the sunk cost bias (persisting with an investment despite its disadvantages) when exposed to mating cues. The sunk cost bias may be adaptive in mating contexts for men, who historically adopted proactive and resource-intensive strategies to secure mates.

She Is in Love With ChatGPT: Now that ChatGPT has brought humanlike A.I. to the masses, a growing number of people are seeking artificial companionship that provides intimacy and eroticism. Part of the appeal is that chatbots respond more empathetically than humans.

"Sexual compliance" involves consenting to sexual activity despite the lack of initial desire for it. Research finds that people perceive more positive than negative consequences of sexual compliance, suggesting that engaging in sex without initial sexual desire does not necessarily harm well-being.

Research finds that girls partnered with girls report sexual experiences comparable to those of boys partnered with girls in terms of orgasm frequency. This suggests that same-gender relationships may offer a more egalitarian approach to intimacy.

Making sleep a priority can improve your sex life. Research finds that each additional hour of sleep is correlated with improved libido, greater vaginal lubrication, and a 14% increase in having sex the next day. Sleep also enhances testosterone and reduces the stress hormone cortisol.

There are 4 "love archetypes" that influence how we approach romantic relationships: Explorer, Builder, Director, and Negotiator. They involve different styles of thinking and behaving, each of which is influenced by a different brain chemical (dopamine, serotonin, testosterone, and estrogen).

Research suggests that women who prefer male friends are often perceived by other women as being less trustworthy, more sexually promiscuous, and as representing a greater threat to romantic relationships.

What counts as "sex?" It depends on who's doing it. Research finds that we're more likely to label a given behavior as "sex" when someone else does it than when we do the very same thing.

"Symbiosexuality" is a recently coined scientific term that refers to someone who is attracted to couples. They are drawn to the unique relationship or energy between two people.

Research finds that sexual humor is a common element in romantic relationships, generally associated with positive outcomes. People reported feeling closer, more accepted, and more comfortable with their partners when sexual humor was used. Use of humor can help mitigate discomfort around sex.

The 4 Main Reasons Why Partners Cheat: sexual dissatisfaction (wanting more or a different type of sex), emotional dissatisfaction (loss of positive feeling, or developing feelings for someone else), anger (wanting to punish your partner), and neglect (feeling overlooked).

There’s one thing people routinely leave out of their online dating profiles: what they want to know about their potential partner. However, research suggests that this detail might be the most important thing to include.

The sex position most frequently used by heterosexuals (missionary) isn’t one that offers women consistent experiences with orgasm. Research finds that other positions (e.g., cowgirl) increase the odds of female orgasm, in part, because they naturally provide more clitoral stimulation.

Research finds that while only a small percentage of women identify as non-heterosexual, a majority of women exhibit gynephilic attraction on implicit measures. These findings suggest that many women experience attraction to other women without necessarily engaging in or desiring sexual encounters.

Research finds that experiencing desire for attractive people other than your partner does not necessarily undermine sexual or relationship satisfaction, unless it is accompanied by sexual boredom.