Some of the best ass I've ever had was unexpected sauna ass. I had no idea the dude was cruising me. He had on a blue speedo. He laid down on his stomach and pointed his ass to me. I got rock hard. Took a chance and pulled out my cock. He pushed his speedo to the side and I went to town on that ass.
I used to go to a gym that had the same type of ledge seating. There were a couple of married guys that would be touching them selves like that and they would bring their legs up like this dude. I'd make them push their butt closer the edge and then stick my tongue deep in their holes while they would jack their loads out. It drove them nuts to be rimmed in the sauna like that.