I say he's wrong.
The results so far:
(Yes, I know. I could have done this as a poll, but then I can't reply when people answer!)
Pretty gay boys are better:
Women kissing is better:
Non-committal both are good: 1
Straight boys kissing are way hotter than straight girls kissing: 1
So my conclusion is that we all pretty much like same gender kissing whether it is boy/boy or girl/girl! I've got a bunch of perverts on my flist. Yay!! I like that!