Red Flags for DMs?

[Zanos]

It helps you to get in character, of course. It lets you feel the frustration your character is feeling at having to repeat the same task over and over again. Works especially well when the GM makes the roll for you, where you don't know if you could have done better.

I'm not really certain I would be all that frustrated IRL if it took me two minutes to attempt to something difficult.

For what it's worth taking 20 is actually not the same as rolling a d20 20 times. Because of probabilities and stuff. You could get a 20 on the first roll, or not until the 100th one.

There's so much more to sexuality than just sex though, and there's a lot of things that could make it into the game without going into actual sex.

Flirting and romance are better just handled with RP. And even those are somewhat minimal in most games I play.