I don't even recall him doing that. I am in the middle of watching the whole series again myself.
When you think about it, you don't see anyone kissing any one else on the show, either. But I think Wayne might kiss one of the dogs on the head in one of the episodes.
You're right, there is no kissing on the show...except for the one peck Wayne gives Gail on the cheek. Oh, and yes, he probably kisses a pupper or two. BTW, I know a great Letterkenny companion podcast to pair with your rewatch. :)
Good catch! I feel like I heard somewhere that little bit was ad-libbed and then kept in because of the awkward reaction from Stewart. But the original point still stands. With all the girlfriends Wayne had on the show (Angie, Tanis, Marie-Fred, Rosie) we never see him kiss any of them.