This weekend I had dinner with a friend of mine who's having a bit of a problem with some friends. Two of her pals have started dating and are so, so, so in love and make sure everyone knows it by making out, snuggling, and pawing each other in public constantly. It's making everyone around them deeply uncomfortable, though, on the whole, my friend is very pleased that they're dating. She's not sure how to handle it, as it's not easy to say to a friend, "Your constant necking in front of me is grossing me out." So, she's taken to avoiding them, unless there are a lot of other people around. But it got me thinking -- how much is too much PDA? I'm dating someone new and we smooch in public, though not in front of friends, and I feel fine about it. What do you think -- when does PDA cross a line?