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When you flash your willy on a date and make the girl feel like she has to take your cum in her mouth, butt, or vagina. Works best when you're still a teenager. Do it when you're old and you’ll end up in jail with the pervert squad.
I pulled out my pecker and she had to swallow my cum. Classic obligation move.
She was forced to take my cum up her ass because I was too drunk to think straight.
He did the obligation move on me and I had to eat his cum like it was my duty.