Co-sleeping

I remember clearly the first time a man farted on me -- and I'm not talking about my brother.

You roll over in the night, you want to be the big spoon, so you cup your body to his, put your arm around his waist, then let it rest on his delightful chest. You nuzzle your nose between his shoulder blades, and you both settle in to the comfort of a warm body. Then: Pffft. Against your thigh.

Here's the question: Is it rude to roll over? Do you just pretend it didn't happen?