Pleasuring your wife's bull is just another form of submission, and is both natural and easy to do.
After all, another man that is fucking your wife's pussy is in the Alpha position and a Beta is therefore compelled to submit.
The King feasts first, and the underlings fight over the scraps.
From that point forward, you can only hope that the humiliation is no too severe (except the ones that crave it). Accept your role, show respect, and comply with his requests/orders. It makes life much easier.