My wife loves that I am bi. In fact, our lifestyle probably never would have started (many years ago) if I were straight.
My wife loves watching me suck her bull's cock and swallow his cum. According to my wife, that is the ultimate way for me to show sub to her bull. She also says that is the ultimate way for me to honor and respect her bull. It also creates a three-way bond that keeps me included in the sexual relationship with her bull.
My wife and I started this lifestyle many years ago, in college, with one of my college buds. From the very start, she has always been very loving, affectionate and respectful to me, even though she prefers having sex with men who are larger than me and way more aggressive sexually.