Although I'd previously only had hetero experience, I have always felt strong stimulation from seeing certain males undressed. The bulge in their underwear, the size & shape of their penis, but never seeking 1-on-1 interaction other than just mutual glances … ok perhaps with some fantasizing about touching or sucking … but not wanting penetration.
One such guy was a close friend of mine, also nominally hetero. We had our first MMF experience with my GF, and have had several encounters since then, either with a GF or his or of mine. I knew my GF found Stewart attractive, so I was able to tease her into trying MMF by describing his penis and the quiet lust I sensed he had for her. It wasn't hard to entice them both to a get-together.
When the moment came, the initial awkwardness was solved by my GF getting Stewart and I to strip at the same time and stand in front of her as she took turns sucking us off. She brought our cocks together to lick and suck them at the same time, pressing our cockheads against each other, like in many hetero porn videos.
It was much more enjoyable than a 1-on-1 headjob from my GF. Having another cock in the mix was so much more stimulating for all three of us. And when I settled down to fuck her, I had a great close-up view of Stewart's throbbing penis going in her mouth, till it was his turn. We positioned so that I was underneath my GF, enabling Stewart to doggy-style her pussy with me in there at the same time.
While still in the category of hetero sex, my naked erection was squashed hard against his, our balls jumbling together, and the rims of our cockheads passing firmly across each others. Although our cocks were wrapped very tightly in a wet vagina, 90% of physical pleasure was penis to penis as our most sensitive bits rubbed together. Stewart was also the main part of my mental turn-on in this memorable encounter, though neither of us needed to admit anything to anyone!
Stewart and I exchanged briefs after this threesome and made a tradition of doing so on each of our subsequent MMF encounters. I now have six pairs of briefs that used to be his, and are now some of the favorite underwear in my collection. We are also now ok about sucking each other in the throes of three-way passion, in fact it's a highlight while also fucking a girl.
Has anyone else tasted their first same-sex pleasures through threesome action?