Great piece of art! Those girls certainly are making sure that he SHINES before the guests arrive! hahaha...
The only thing I can't figure out is what that girl lying on the ground has in her mouth... What is that? She isn't missing all but two of her teeth I assume... it looks like something is wedged in there... but I can't make out what it is...
And about the foreskin: Yes, it's normal that it should retract when erect, and normally no cutting and sawing has to happen for that. There are men, I believe, where it never retracts far enough and I think that's to do with the skin not being supple enough. But I'm no doctor so can't say much about that.