I'm heterosexual myself and still find that while the concept of homosexuality is perfectly fine in my mind, I still internally (and sometimes externally) cringe when I see two men kissing. When I see two women kiss, I don't find it nearly as disturbing visually, which suggests it's more a male-to-male thing than a homosexuality thing.
The physical side of those relationships seems to bother me to some degree, though it has lessened. That's where my rational side and instinctive gut reactions meet, and I'm trying to be conscious of it and tone it down.







