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1.
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!"

"Well, better to be safe than sorry."
by Disco duck March 07, 2014