(CNN) If you think you're too tired for sex, you're not alone. It's clear that sex and sleep are closely tied together." The sex-sleep cycleIronically, a sex drought can actually worsen sleep, setting you up for a vicious cycle of irritability. "For women, estrogen levels increase after sex, which can enhance a woman's REM cycle for a deeper sleep. Sex and sleep may be linked in other ways as well.

Source: CNN June 01, 2017 10:18 UTC