So I have done cuckolding / forced-bi on maybe 6 occasions (for me they are very similar experiences). An observation:

Cuckolding is hottest when there is a strong desire by the beta to want to have the lady otherwise it’s just like watching porn albeit hotter because in person. I have had the strong desire build up two ways : (1) being locked in chastity for a week and then tied and unlocked while watching close by and (2) by having some pleasure given first such as some intense edging.

For me it’s about seeing and knowing that another cock is getting the pleasure I am desperate for.

Also forced bi and cleanup adds to the humiliation aspects

Of the times I did it the hottest was having a collar on that was latched to a bench while handcuffed and sitting on the floor - was “forced” to fluff him to erection, watch them enjoy themselves for like 45 minutes with a throbbing erecting. He came on her butt cheeks and I got to lick it off. They then sat on a sofa in front of me and uncuffed one arm but tied it to a rope they held. They told me to masturbate and each time I was getting close they would jerk the rope and pull my hand away from myself laughing as I edged myself for an hour or so. Eventually he got a blow job while I watched. My chastity cage was put back on but I was given the key and sent my way

I wanked off as soon as I got to my car