Leil Tevilah (Ritual Immersion) Gets an Evolutionary Push

Those familiar with Jewish laws of family purity know that the Halachic intimacy calendar, in effect, supports fertility by keeping each partner in his or her own "corner" until around the time when the wife is ovulating and is, if you will, "ready to rumble." (Notwithstanding the unfortunate and Halachically challenging situation of a early-ovulating woman.) Scientists have now found that men's biological wiring supports such intimacy optimization, as well. A recent study published in the journal Psychological Science found that men who smelled t-shirts previously worn by women who were ovulating showed increased testosterone levels and were significantly more likely to rate the smells as pleasant than men who smelled shirts of non-ovulating women.


Now, if only there were some way to get mens' dirty t-shirts to smell "pleasant"...