How to find to be a good bull.

Ditto on the show up. Just a few more, be honest don't send 5 year old pics and tell them you are a non smoker ... then show up with a full beard and belly and smelling like an ash tray. Be open minded, ask questions so that you know what this specific couple might like or dislike, don't leave out the husband... Being a stag/cuck and bull for others, I feel I have a good perspective of what he might like as well. I make sure he gets a good view of his wife being pleasured/used by me.