No homo, but you've really got to do stuff like this for yourself. But you'll need to aim to do it for yourself.
If you try and get pumped for a girl or something else, and whether either way you'll eventually loose it, which will end up in a mind fuck meaning you'll probably stop exercising, which isn't good for you.
I personally exercise to be fit and healthy, I'm not the best looking guy, but when I see some guy with a girl, then at least I can say to myself, I could probably take him in a run/swim/fight.