Signs of good sex?

Silly question I know lol. Reason I’m asking is because a few times after sex I’ve looked in the mirror and saw my hair looking a total horrible mess. I was embarrassed every time and asked why they didn’t tell me I was looking so crazy, and each ex told me “that’s just means you had good sex”. I always brushed it off. But it happened again recently with someone I’m currently dating who said the same thing. Wondering if men have these like known signs that good sex happened, that they don’t tell anyone until it happens.