Once wrote a series of short stories about fantasy creatures living and working in a warehouse. My favorite were the weekending ghosts, who haunted a manor through the week, but took weekend trips to haunt the warehouse on Saturdays and Sundays to get a break from it all.
Docking is foreskin play, inserting something into the urethra would be a type of sounding.
But if you can sound with an entire human cock, you’re doing something pretty extreme shit