If ur passionate (we’re turned on) and of decent size (or at least know how to move it quick and in diff angles) it feels like putting the last piece of a puzzle in, or scratching a rlly good itch and building up the friction. All in all it feels like something that’s meant to be there filling you up. For giving head focus on stimulating the little bulb closest to the stomach (clit) in different motions of ur tongue. Personally I will go crazy if hes doing that and fingering me at the same time