They will use all sorts of terminology for it. Its when they want to pay you to have sex with some random stranger or some male escort and he wants to film it, wanting to do... urrrgggg sick stuff! I mean, some guys requests want you to go bareback with another random guy and all sorts of things from sloppy seconds to him eating it...
To me, things like that is cringey.
Oh! and one client I remember asked me, when we were in this swingers club with this dark room with loud music inside, if I wouldn't mind going in without a condom and coming out after another man has had his way with me, and THEN he wants to drink it...
You have to learn to switch off or else you will start to go insane. Blank it off, ignore it, keep your mind occupied with everyday things.