>>Perhaps it's a difference of the communities in which we live.<<
Maybe.
I lived in Cleveland for many years. I wish I knew couples who would do everything to avoid being "in your face"!
I am not a big Public Displays of Affection type person. Homo or Hetero. When I was around gays, that was a big problem (after the high school years). I don't slither all over my hubby, I don't want to see you do the same. Or the agenda pushing, "This is my SPOUSE!" from people who are not able to be married. Or "I'm Suzy's OTHER mommy!"
Try explaining that to your five year old.
Honestly, I just try to avoid it.
I guess we're lucky.
All the couples I know are monogamous (as far as I know), childless (they don't seem to have the need to make a statement) and I have never seen them show physical affection to each other (nor do my husband and I show physical affection around others). My kids have never asked about the particular sexual arrangement of our friends but then again they have never asked about our hetero friends either--just as it should be!
I agree totally with the PDA--I don't care who you are--yuck! :-)