People tend to react way too negatively to it. As long as they're not looking like they're about to ****, I think it's sweet to see two people so proud and confident in their love for one another. If you really don't like it, you can always look away.
I was in line for this rollercoaster at Universal and there was this lesbian couple that had their lips glued the entire HOUR. There were kids in line, including my little sis and it was just so uncomfortable like can you even breathe