Do guys really get too tired for sex?

[Anonymous]

I always assume guys are ready to do the deed anytime. We were both exhausted after a long day so I promised morning sex. So morning comes, I try to be sexy, rip his clothes off and get on top. After awhike of doing that, I wanted to switch positions to doggy. He went at it for a couple minutes and felt tired. I offered a blowjob and he told me no, that that probably wouldn't happen either, before rolling back down to lay down. I feel ugly, hurt, and disgusted. I don't feel sexy nor am I keeping him happy, even though he insists it wasn't me but we don't see each other much due to his job, so I feel like he should have been ready, like is too tored an excuse not to want to have sex or cum? I'm feeling super low about myself.

[Anonymous]

Sounds like he's tired and stressed. I assume his job is a big factor.