My participation and involvement are different with each of my wife's bulls. When we have a bull over to our house, my role is first my wife's pleasure and second to ensure the bull has the most memorable experience possible. I always ensure that the bull has a cold beverage of his choice and let him know that he is in full control of the encounter.
Some of her bulls like for me to be naked and watch, others like me to leave the house to provide them with complete privacy, and others like me to be involved. Since my wife's time with her bull is not about me, I do whatever is requested of me at the time.
One of her regular bulls enjoys me watching as he undresses my wife in front of me. He almost always incorporates some form of humiliation into their foreplay, and it seems to get him going, which my wife enjoys.
During his last visit, he and my wife were kissing and making out in our living room while I was in the kitchen putting away our lunch dishes. He brought my wife into the kitchen, stood her facing the table, and pulled her jeans and panties down as I watched. Once her ass was bare and exposed, he told me I should be kissing her ass, and I got down on the floor and kissed my wife's ass as he watched and commented.
I became aroused very quickly, and after he told me to stop, I stood up, and he laughed, saying he could barely notice a bulge in my swim trunks. He then pulled his 8" cock out, and as my wife watched, he pulled down the front of my trunks and then asked my wife which cock she wanted inside her.
After he and my wife both had a good laugh, he had me undress him. I was not allowed to pull my pants up and had to keep my cock out and on display the entire time they were together. He fucked my wife on our kitchen table and shot his load up inside of her. After he pulled out, there was a small puddle on the table, and he told me to lick it up, and I did, still with my cock out but not permitted to touch myself. After licking up the mess, I made them both drinks and went out to uncover the hot tub for them.
After being in the hot tub for almost an hour, they got out, and he wanted me to beg him to fuck my wife for me. This particular bull loves for me to tell him how much more he is able to satisfy my wife than I am. After he has humiliated me, he fucks my wife very hard, and she loves it, so I do what he wants for her pleasure.
Once inside the bedroom, my wife was on the bed, and our friend was standing at the bedside when he told me to suck him to get him hard for my wife. After about ten minutes, he had me stand naked, so our cocks were side by side, and he again had my wife choose who would spend the night in her bed. I slept on the couch that night but could hear them clearly.
But, every bull has different expectations and desires, so I follow whatever my wife and her bull want at the time.