Sliding in and out a well designed Fleshlight texture, from your cock’s head point of view. Look at all these bumps designed to rub against the head as you plunge inside, the protrusions your cock head will have to force through, the straits it will have to go past. Think about the narrows the back-head will have to face on the way out, the protrusions once again resisting your withdrawal. Things that makes you go hmmm !?! Oh yes !