A little too loving?

Everyone knows that couple who is obnoxiously affectionate, you know, hugging, kissing, whining, baby talk and the like? Personally I don't object to hand-holding, putting your arms around each other, and the occasional peck or 'I love you' when in public, but when couples are full on making out or cooing and baby talking that is uncomfortable for everyone around you! Where is the line drawn as far as PDA goes? I asked two of my guy friends what their opinion was, and this is what they said

What do you think?