I know there is an increase in gay affection on TV, in ads and in dramas, and I guess heterosexual people notice it because it looks different to us, which it is, and because it has not been seen until reasonably recently.
I would never suggest that raising the subject and putting your point should leave you open to accusations of homophobia -
I don't like seeing gay people kiss on television - fine
I don't like seeing gay people kiss on television because they all ought to be burnt! - not fine.
I don't like PDA's either, but I am happy to accept that the world around me is changing and becoming more tolerant of different relationships, which I am entirely in favour of, and that such changes are always going to be reflected in art- which means tv, radio, films etc.
None of us like everything we see - that's what makes us unique, and expressing a view, even a less than positive one, is your right in our free society.