Why not ask whether anyone's had "pity sex" instead?
Either way - who hasn't?
As for stories, once it took me about ten months to live down giving "pity sex." The pitied one took my agreeing to sleep with him to mean we were close and inseparable. Getting rid of him for good did take that long.
There have been a few occasions when guys were reluctant to let me blow them (thinking they could "hold out for 'something better'.") But when their little head did the thinking for them and I got to do the honors, they were glad.
In these cases it's not so clear in terms of whether "pity" was involved. Being turned down for superficial reasons wasn't going to ruin my day. Nor, for the other man, was running the risk of having to take matters into his own hand going to ruin his
A friend of mine referred to pity sex as "charity work," LOL...and there's nothing wrong with some charity now and then.