When wearing a coat makes sex nigh on impossible therefore proving to be much a much more reliable and safe method of birth control than Coitus Interruptus or the withdrawl method.
"Last night Kelly and I were all over each other, but when we got in the house I couldn't get my damn coat off!"
"Haha, you wear that thing so tight you look like a dog's lipstick."
"Not funny bro! She couldn't reach the goods, it was total Coatus Interruptus!"
This is a very effective way of birth control. Before the male ejaculates inside the pink vagina remove it. This may make a mess on your bed, but it will keep you from getting pregnant for sure.
When in one session of sexual pleasures, you recieve a hand job, blow job, sex, anal sex and finish up with a tit wank. And only cum once at the end during the tit wank.
When something like a fart or an awkward action of some sort interupts a couples intercourse making the male's genitalia go limp, thus ending the sexual act.