Whenever someone says “You scratch my back, and I’ll scratch yours” I feel uncomfortable.
In order for us to scratch each others backs at the same time, we’ll need to get awfully close to each other, and facing each other.
We’ll look awfully silly that way, and not that I have anything against people of differing sexual preference, I’d rather not get a reputation for that behavior.
“We’re just scratching each others backs!” I say.
“Oh, sure you are,” you say, and wink.
Sure, we could take turns, but who goes first?
We toss a coin, and both call heads.