Not full on making-out, its not needed. A kiss that's cute and meaningful's okay. It also depends on the couple, skanky couples bother me and I know that's prejudice but hey, that's society these days.
when its a couple that are both really ugly/digusting and it makes you think "wow, how are they attracted to each other???"then that makes me want to throw up!!! (i know that sounds kind of mean, but im just being honest!)
but if theyre both at least decent looking, it doesnt bother me at all