Because of his ass he feels a lot of butterflies in his stomach.
Her boyfriend is gone and she wants to spend some time relaxing without anything from the outside world caring about her. Basically it is his way of dosing so much pressure that the world generates these days with those things about pretensions and the rest. She just pretends to be what she is. And that’s when her lover enters the scene, since he knows that she feels a lot of butterflies in her stomach because of her ass. And that’s basically what he gives her every time they see each other. She takes off her clothes and gives him a blowjob, after he has her hard and has had a good time with her pussy, then it’s her turn to fuck him anal.