Help me!!

Danielle • I`m always tired tbh.
So my boyfriend and I were fooling around, and well his penis came out but I didn't know what to do with it Bc a) I've really never seen one and b) I'm not going to suck it Bc stds, unless he gets like checked yanno? (That's a thing we need to talk about before going that far) So any tips on like.... What to do with it??? Like uh?