The first time I let a man cum in my mouth was the first time I ever sucked another man's cock. I was 26 at the time. It was in SF at a gay bathhouse. I was bi-curious and had already let a man, a complete stranger, give me a hand job in a straight porno theater when I was 22 (this was in 1976). I knew I liked having my cock touched by a man but I wanted to see what it was like to touch another man's cock, take it into my mouth and find out if I liked sucking cock or not. I was living in LA and was very concerned about someone I knew seeing me so I decided to go to SF and visit a bathhouse there to have my first experience giving a BJ.
It was a weekday morning and I entered the bathhouse, paid my money and was given a towel and a key to a private room. I went to the room, took off my clothes and headed out to explore the bathhouse and hopefully hook up with a suitable man. I went past the shower area and came across the sauna. I decided to go in and found it empty. I sat for a while by myself and after about 15 minutes or so I was pretty hot and sweaty so I decided to go back to the showers and get cleaned up. After I washed I decided to head back to the sauna.