Could it have anything to do with your personal attraction?
I mean, the stereotype of hetero men who love to watch girls kissing is well known. I have had discussion with some women to admit to actually finding it attractive when two men show various levels of affection toward each other.
I know I personally get kind of grossed out if I ever see a older guy with his trophy wife doing anything more than holding hands.
To me, the simple explanation is if it would be uncomfortable for you to do, you will probably find it uncomfortable to watch. We are biologically and culturally conditioned to have empathy for other people. Keep those mirror neurons firing!
Of course, biblical creationists are committed to belief in God's written Word, the Bible, which forbids bearing false witness; --AIG (lest they forget)
™ Version 4.2
