[ eric has had a few years on puck to get his technique right. it would bolster his ego (as if it needs bolstering) to know that she thought the kiss was amazing. eric is certainly enjoying it in any case and he's being good (because he likes quinn) and controlling his fangs.
the enthusiastic kissing and the reprisal of that kissing is nice, amusing but in a good way. quinn's thoughts on the bots are pretty much eric's. he's not been seeking out the kissing or the bots and, not that he'd ever admit it (because it ruins his rep), if he's going to be kissing, he'd really rather kiss sookie for a myriad of reasons that have to do with such human things as love, such basic things as sex and nothing to do with the punishment he might get into for breaking his license. ]