First time being cruised in the steam room

Went to the Y last night, and went my usual steam after my workout. I am guessing the Saturday night crowd may be a little more flirty but that’s from no experience, I usually just have old guys chat me up about sports or etc. This time an African American guy who is pretty ripped starts staring at my junk once it is just ya in the steam. I let him watch but then notice he is slightly jerking. He shows me his hard dick but we don’t make direct eye contact. I am hard too but I am not making any direct plays other than showing off because I have never done anything like this and worried about people coming in and seeing us hard/jerking. He is definitely continuing to show his erection (quite big), but he has a little towel that he throws over it when someone comes in. He ends up leaving when someone else joins, after we are mutually kind of massaging ourselves. He comes back after a few minutes, then more people join so I end up showering thinking the time is up.

What is the protocol for this? Did I miss a cue? Is that it?