Abraham Myerson measured initial levels of circulating testosterone in men and exposed their various body parts to UVB light. After eight days without additional UV exposure, testosterone returned to initial levels. In higher latitude countries, where UVB availability varies dramatically during the year, conception rates are indeed at their highest in late summer and birth rates are highest the following spring.
Not in the mood tonight? Have you ever had sex that's so toe-curlingly fabulous, you can't think straight? For one woman in Washington, DC, a roll in the hay with her husband zapped her memory
Situation and questions: I'd been married for 17 years to a wonderful woman. We are both 39 years old, but after having excellent sex with my wife, I become very, very tired It's like after sex I don't have energy for anything else.
Postorgasmic illness syndrome is a syndrome in which men have chronic physical and cognitive symptoms immediately following ejaculation in the absence of a local genital reaction. POIS symptoms, which are called a "POIS attack",  can include some combination of the following: cognitive dysfunction, aphasiasevere muscle pain throughout the body, severe fatigueweakness, and flu-like or allergy-like symptoms,  such as sneezing, itchy eyes, and nasal irritation. The symptoms usually begin within 30 minutes of ejaculation and can last for several days, sometimes up to a week. In some men, the onset of POIS is in puberty, while in others, the onset is in their twenties.
Given the amount of pop culture and media devoted to sex, it might seem like the facts are pretty clear. The proliferation of these myths leads not only to sexual dissatisfaction, but serious self-esteem issues. According to one studymore than 60 percent of women have faked an orgasm during intercourse or oral sex.
Of course, for all of us there will be times when we genuinely are too tired to even think about sex - but if this becomes a constant theme in your relationship, it's important to address it. For many people, a satisfying sex life is important to ensure closeness and intimacy in a relationship. If one partner feels they are constantly being turned down or pushed away, it can lead to issues.
Benign paroxysmal positional vertigo BPV is one of the most common causes of vertigo. Vertigo is a sudden sensation that you or your head are spinning. You may also experience nausea or vomiting.
Weakness after sex or masturbation. Post ejaculatory asthenia Many people feel weak, tired fatigued, tense, lack of memory after sex. This may occur in young boys after masturbation or after marriage after coitus.
For many women, the correlation between sex and snoring is one of those annoying facts of life: no matter when passionate encounters occur, men always seem to fall asleep immediately afterwards. So in lieu of a cure, a better explanation will have to do. Although women sometimes feel sleepy after sex, the phenomenon does seem more pronounced in men.