I know my husband will shower when he comes home and he's rarely okay with me giving him head right after he's gotten home from work. I'm the same with him. More due to the gross feeling of being dirty. Neither of us really ever stink, but as far as genitals, men can really stink up the place when they stay sweaty for too long. Even my hubby can admit to that. It's nothing to be ashamed of, of course. But a man should take care of himself too. A little sweat is no biggie, but if it's been all day at work + the gym, a shower wont kill ya!