When a guy cheats on his girl, why does the girl place all the blame on the girl he cheated with and not on him?

loveisbeautiful
The title pretty much say's it all. The reason
I ask this is because I was watching a movie
tonight and this guy cheated on his girlfriend
and she probably wouldn't have known it.
Had they not been at the same party and had
she not seen him coming out of one of upstairs
bedrooms buttoning his shirt up. She saw the girl
he cheated with come out of the room as well.
But, instead of being mad at him. She was mad
at the girl.

I realize movies aren't "real life", but in some
cases, they are. And, woman do seem to get
more mad at the person the guy cheats with then
the guy. Why is that?

See, it wouldn't be a Tango without two people
(being of either the dancing or hortizontal variety).
It takes TWO to Tango, so why only get mad
at one? Obviously, the girl has every right to
be mad at the girl who slept with her man.
But, no one told he man to stick his "you
know what" in her "you know where". He did that
all on his own, so he's just as gulity as the girl
he cheated with (maybe, even more so).

Question is: Why does the girl get mad at
the chick and not at the dude?
When a guy cheats on his girl, why does the girl place all the blame on the girl he cheated with and not on him?
10 Opinion