Haha, Giga. I was actually thinking the same thing, but just didn't say it.
Look Rico, no one here thinks you're a pig or a bad guy. But you seem to have more of a problem with the way your girlfriend acts over this, rather than the fact that she wants sex more than you.
You want her to go ride a bike and exercise out her feelings when she's hurt or angry? That's not her way of dealing with things it's YOURS. Deal with her the way she is. Hemming and hawing about how unfair it is that she acts this way is not going to solve your problem.
Rational talking and reassurance is a better route.
“Inside every cynical person, there is a disappointed idealist”--George Carlin