(18M) Recently I have been staying awake with work a lot, making sure to book hotels with pools and saunas, yesterday I was chilling in the sauna after my shift in just a towel no swimwear, I was in there alone and laying down, about 5 minutes later a older guy walked in wearing some swimming trunks. Another 5 minutes passes I go to readjust and sit up and my towel undoes and my semi ercet dick falls out, I try to cover myself up but before I can the guy turns and says to me that I can leave it out if I want, so I do. I begin to jerking it as he watches, I can see him getting hard and I’m getting pretty close, and just before I’m about to cum I hear the door that leads into the room where the sauna is open, I quickly cover up and sit there like nothing happened and this young woman who just walked in was none the wiser.