"At least I come bearing gifts." It's fair of Q to suspect such things; John is, after all, a fairly suspicious sort and should probably not be trusted. His grin is lopsided and easy and he leaves his hair mussed, because it wasn't like it'd been orderly in the first place. John Constantine is the sort who wakes up and goes as is.
"Tempt away, then." If the movie gets boring, he'll just go back to the objectifying option (although seduction sounds far more proper, ta). It isn't hard to steal most of the space on the couch when Q goes to fiddle through DVDs. "You aren't allergic to dogs, are you?"