I've done it once with a masseur, but it was an after the massage shower. It was like you described, mutual lathering and some sensual touches, there might have also been some kissing but am not sure now.
Another time, it was a post-coitus shower at an escort's. I got hard again. He said: "Well, we can't let you leave like this!". And we ended up doing it all over again in the shower. He wasn't a clock watcher, needless to say.