Doctors arbitrarily diagnose infertility when a couple hasn't conceived a child after 12 months of unprotected and frequent sex.

He went to bed late and rose early, and the space in between was lively with frequent, prolonged and energetic sex.

A proud, confident, highly sexual woman, most of her storylines revolve around the frequent sex and brief affairs she has.

The less frequent the sex, the greater the risk for ED.

"He wanted to have more frequent sex and it was the last thing on her mind" (1:48)

Thomas refused to take any responsibility and continually pressured Kristin for more frequent sex.

In women, more frequent sex also stimulates circulation to the genitals.

That sense of faded attractiveness was linked to less frequent sex and a drop in sexual desire.