LuisCarol
The evidence is that bit you just said about not replying like that to men. It's right there in that sentence you just wrote.
Yes, I made the point that a heterosexual is unlikely to find members of the same sex "stunning", only members of the opposite sex, and therefore you would not particularly expect them to describe them thus.
I think you are on a sticky wicket deducing sexism from the fact alone that a heterosexual man would describe a woman as stunning but not a man. I've been known to describe Angelina Jolie as "stunning" (or similar words to that effect). I feel no need to lie that I find some man stunning because someone else has the notion that I am being "sexist" otherwise. Although that said, if I was to voice my thoughts to Angelina on her Lindekin page you could certainly say that I have been inappropriate.
Assuming that the speculation made by another poster that he would not have described a man as stunning is correct, this is not enough "evidence".
LyndaNotLinda
As far as I am aware, misogyny means hatred or contempt of women.