She was dancing because she was playing a game tbh as she told him about himself, the party game. And Olivia licks Paul's ass, might as well spread his cheeks.
Paul is talking about "say it with your chest", Trish literally did you couldn't handle it.
Look at Dylan loving it! He's got someone else that also tried it and Trish told them about himself, he's loving having another "victim" of "Trish's treatment".
The guy is full of crap