Not gay or bi at all.....years ago at a small college party, 3 guys, 2 girls smoking and drinking. We tried to get the girls to kiss then to make out. After maybe 20 second french kissing they wanted us guys to kiss, didn't happen. We got the girls to kiss topless. Soon we were all naked. I'm not sure how it happened but one of the guys was sucking my dick while the girls watched. I had to pull his head up to keep from cumming in his mouth. The girls loved it. Each guy took a turn sucking each other for a quick minute. I had the smallest dick one guy was friggin huge other guy in between.
The girls wanted one of us to suck and swallow. I said no way. Huge guy went down on middle guy and within about a minute he had swallowed the load. The girls obviously liked watching. One girl went down on huge guy then jacked him off, he shot 5 or 6 spurts really high.
We each fucked both girls with a lot of oral mixed in with everyone. It was fun but not something I ever did since.