I think it's cute.
Stuff like this angers me: people freak out when a nonconventional couple show a little affection, yet whenever it's a guy and a girl, and they're all over eachother, it's completely fine!
Ah, but yeah.. I do think it's cute. I find myself smiling whenever I witness something like that. It's just so.. Innocent, ya know.
Eh, I'm starting to sound creepy now, so I'll stop. ;p