I had several male-male experiences over the years, reaching a pause during my freshman year in college. In that interval, I never considered the experiences as bisexual, or homosexual, just opportunistic, perhaps taboo - neither did I label or categorize myself as bisexual or homosexual.
In my late thirties, I resumed bisexual experiences, first with another couple, a Craig's List hookup. I've never really looked back, but I still consider myself more pansexual, if I were forced to adopt a label.
Both my wife and I really, really enjoy group sex, which often includes bisexual contact between the participants, both male, and female. Sometimes it is reluctant, curious, as an inexperienced participant explores opportunity, other times enthusiastic, performative. Always hot.
We currently live in a poly situation, my wife, me, and three other men, two of them I'd categorize as her lovers, one a live-in fuck buddy we all share. The opportunity is inbuilt for the male part of our group.