It was used for a time because it was not easily detected and was always to hand. Astronauts have admitted to masturbating in space via the term self-pollution. The male orgasm can last anywhere between five and 22 seconds. Some men suffer retrograde ejaculation, where their semen shoots back into the bladder , rather than being squirted out. Dolphins and bonobos are thought to enjoy nookie , while fruit bats are fans of oral sex. The Greeks thought period blood was actually impure semen.
Pulling out also called Withdrawal Method requires no additional hormones or devices, just impeccable timing and a lot of luck. Where there is a risk of inappropriate application, inconsistent use or just plain human error. FYI without contraception 85 in young women will get pregnant this year. Remember, if you're going to do it it's worth doing right. Source: Trussell J.
Here's how to inoculate ourselves against negative ones. Verified by Psychology Today. The Mating Game.