Why do women get to say they're tired all the time while I'm also tired?

I just don't get it.<br><br>I have been working a 12 hour shift almost everyday for the last 6 months and take midnight walks after to train my dog. I'm tired. Why don't I get to complain about it like they do? Why don't I get that luxury?<br><br>My gf understands what I'm saying here but thinks I'm being too extreme. She's always tired too and complains about it (and she's not working atm) but I just don't understand... we're tired, but she gets to be tired and I don't.<br><br>That's my rant.