He doesn’t really know what he’s doing, but he tries to quickly figure out what Tom likes. If he swirls his tongue in a certain way, if he flicks it quickly in and out, if he uses his fingers to pinch and roll a nipple, he can very much tell that Tom likes it, paying close attention to Tom’s thighs tensing up and his back arching off the bed and any moans that escape Tom’s throat on occasion. 