The plastic surgery part certainly isn't true. The porn industry caters to all sorts of tastes, including imperfect bodies. A single visit to a popular porn site will demonstrate that.

As for kissing - OK, so that is one understandable definition, thank you for that.

I think sex is simply weird - if you think rationally about sex it is not really appealing. It only works in a state of arousal. That plays into the hands of feminists who frame sex as something disgusting being done to women - it works because people are rarely aroused while reading feminist pamphlets...