Because generally speaking, if you're pining over straight guy friends it's almost always because you're lonely and don't have anyone in your life.
You're only setting yourself up for failure, heartbreak, and the loss of a friend.
There has only really been 2 girls that I have had the admiration for that is equal to the admiration I have had for some men and both of those lady friends of mine did not love me they way I loved them.
Is like watching Chuck Norris, and after the first tickle, he suddenly he becomes Greta Garbo.
I know that he probably remembers at least something, and is probably very bothered by it.
For me the dirtier the better.
In other words, I'm attracted to him and the fantasy exists, but I know there's no chance that we could ever be together.