the only excuse for kissing with swine flu masks on is if you're doing it ironically.
otherwise...just stop it. far more people come down with normal flu than swine flu--and more people die of regular flu than swine flu. the whole "omgpandemic!" thing is media fearmongering, no more and no less.
before this whole swine flu mess, you weren't going to put a mask on to kiss someone just because you heard through the grapevine that a person several states away got garden-variety flu. so, the fact that people are freaking out so much about this swine flu thing just annoys me, and reminds me how susceptible stupid people are to anything that the media talks about a lot.