Uni had been a bit of a time for Q - the curriculum had been laughably easy for him, so he'd basically checked out of the classes and used it as the four years of hedonism he wanted it to be. As a result, he'd grown proficient at orally pleasuring men and woman - he liked being good at things, and it was fun.

Not to mention, sometimes it came in handy, like when he could work his hand up to tease a finger at Hermione's entrance while he sucked on her clit, starting to slip it in.