If I catch my girlfriend in bed with another man and later send her a picture of my penis in a plastic vagina with the caption “This vagina satisfies me better than you ever could!”Only until you'd realize she's serious and your performance rates lower than that of a piece of silicon. And that's both in and outside of bed. People laugh if their ego lets them believe something isn't true, but it stings quite a bit when it gets through to them that their self-assurance isn't really warranted.
(now, granted, Logan has enough of ego to shrug it off, but then he also has enough of ego to similarly shrug off seeing his short time ex pathetically latch onto some random midget)
So you mean that my (former) girlfriend will cry herself to sleep out of grief and not out of laughter?!