Would you have sex with him? He's probably got all sorts of STDs. I can't say I'd blame her for not wanting to have sex with him.
to have dated John Mayer, a notorious 'player' whose reputation is even worse than that of little boy Styles (and about whom there have been some truly shocking "Blind Items" in the past).
If Taylor didn't want to have sex with Harry I suspect it is because he has a dick, not specifically where it had been.