I just want to point something out. We're all aware that sometimes celebs publicists tip of the paps and the celebs put on a show of PDA to "announce" their relationship. But sometimes they actually don't know they're being followed. We can't know what's genuine and what's not (unless it's one of those completely obvious staged sets of pics, which also happens!). Also keep in mind that some people (famous or not) are more comfortable with PDA than others.What does A list have to do with anything? You said "celebrity couples". Plenty of them who are photographed often by the paparazzi, some of them on a almost daily basis display PDA. Lots of them don't. Leo's up and down with it. This was one of the first photos of Leo & Bar when they first started dating: http://tinypic.com/r/25incjn/7
But in general, I do think some people are reading too much into this. Isn't it possible that Leo and Blake hooked up because they liked each other? Yes it's an odd couple but so what? We've seen odder. Is it really necessary to make moral judgements on either of them because they've been seen together a few times?