I tend to stare at happy couples! I've never been annoyed by a happy couple showing affection. I think it's cute and the world needs more of it. I've never really seen a couple take it to far. I've never heard a couple use baby talk, if I do, I know I will be annoyed!!!
Now, if you are out with friends, and you are sort of the third wheel, and they are making out the whole time. . .that is annoying. That is different though.
I don't even have a problem with gay couples making out. I hear people say that gay couples showing affection is too much because it's so uncommon. I've seen a lot of gay couple go at it since my move here to the Bay Area!! It's all good.
I wish I had somone to call smootchypoo and kiss and slobber on in public!