In public I'll hold hands with my boyfriend, and we'll give each other pecks on the cheek or lips when we greet each other and say goodbye, and maybe do some playful shoving every now and then. But we aren't all up on each other all the time, neither of us really wants that or likes seeing it from others in public. People totally making out in public is just really awkward and insufferable, and there's certain places you don't need to be grabbing on your partner when out in the open.
One thing I've been seeing lately that really bothers me is couples who stick their hands in each other's pockets. And by that I mean essentially grabbing their hips or ass, but under the pretense of putting their hands in the other's pocket. And I see them doing it in the weirdest places, like in the cereal isle in WalMart. You do not need to be LITERALLY attached at the hip when deciding between Captain Crunch and Fruity Pebbles, so just cut it out.
To me, people who show excessive PDA in public are just trying to prove something. I've been going out with my boyfriend for over a year and a half now and we sometimes walk down the street hand in hand when the mood strikes us. Oh, you GROPE one another in public? And you've been going out for two weeks now? My how in love you must be. I imagine you'll be fucking on park benches by your three month anniversary.