Pregnancy isn't currently in the game. You might wanna take a look at the description for that contraceptive rune.
You do more damage with your holy attacks, all 2 of them. Virility is a double-edged sword because while Holy attacks are most effective against the demonic monstergirls, losing spirit while in nearly any stance with one will drain your energy and reduce their arousal. Also, if your virility is too high, your character will be "pent up" more often, with lowered defenses to arousal until they cum.