I actually like what Chibnall did for Torchwood season two, but he's clearly talking out of his arse here. The lassie may be chatting to Owen, even chatting him up, but Owen's use of the pheremone then removes her ability to change her mind or say no, which makes it no better than Rohypnol. The lie is given to Clarke's assertion that it only magnifies feelings that are already there when Owen uses it on the angry boyfriend who's about to punch his face in. Owen is a rapist, simple as that. Judging by the way he uses the spray, he's done it before too, which makes him a serial rapist. It's for this reason that I found his ending pretty appropriate. In my personal Torchwood canon, he's still inside the reactor, slowly dissolving.

Chibnall's not a bad writer, but his argument that "it's funny" makes it clear he hasn't given any thought to this at all. I can't wait for the "comedy" child-abuse scenes and the "slapstick" incest storylines.