Have you ever been in public and a couple will just not stop making out? If they're lesbians at a Seattle Mariners game, you can have them removed. But anyone else (and if they're just making out, maybe with a little over the clothes groping) and you may just have to sit and take it.
Yeah, crazy right? (It's like that scene in Mall Rats where Jason Lee is describing the plane crash his cousin Walter was almost in.) I'm not sure if I believe it but I've seen some crazy things in New York. I once saw a homeless guy with a bologna sandwich for a foot (that's not true).
While a couple en make-out res may be as easy to look away from as a solar eclipse or car wreck, most of us really don't care to see other people getting frisky (unless they're attractive AND we're in the privacy of our own homes or sex clubs). While other cultures are more averse to PDA (the Japanese think holding hands is weird and public kissing in India could get you the Richard Gere Treatment*), our schizophrenic stance on sexuality (damned Protestant pornography has made us all vestal voyeurs) makes the whole kaboodle conflicting and uncomfy.
Not for nothing, I don't mind a little bit of PDA. I've made out with someone in a bar before. I would say it's not my proudest hour but I am sort of proud of it. The key to any public make out is being able to leave that place before things get out of (or IN) hand. Em & Lo's Man Panel tackle PDA as well.
My new homeslice LostPlum (though not technically an American), explains her dislike for PDA and gives some scenarios where it's permissible (she also clears up that PDA, in this instance, has very little to do with your BlackBerry). Read: How To Have Sex In Public
While I'm pretty OK with PDA, I can understand the need to a certain level of decorum. Here's the bare minimum: