Guys, "he did something to my ass that made my eyes water" What is he referring to on HTGAWM?

[pink_love]

I'm curious what the act was? Anyone know what he might have been referring to in the show how to get away with murder when two gay men are finished having sex one is on the phone with someone and says "he did something to my ass that made my eyes water". What was the act he was referring to?

[Anonymous]

wtf is htgawm