It is a combination of things.
1. It helps us reconnect. She tells me all of the details about her time with her bull while I clean her.
2. It shows her I approve of her actions.
3. It acknowledging the bull's superiority and my submissiveness.
4. She really enjoys it. She is so sensitive after being fucked by her bull that she climaxes several times. Each time she pushes more cum out. He likes to cum in her pussy as deep as he can. It takes a while for all of it to work it's way out.
5. It is humiliating. She laughes and teases me about how turned I get doing it.she laughes at my little erection and tells me it would be a waste of time for me to try because he as stretched her so much she wouldn't feel me. If I am still caged while I clean her, the cage inflicts pain as I try to get hard.