I'd be absolutely mortified and raging if my dh turned round and said "Go and get a bath, I don't want your dirty vulva on the sheets". Honestly, I couldn't come back from that.
I tell my dc's that their bodies belong to them (we've even got a sweet little book about it 
), there are good reasons for them to look after it (which I'll explain and remind them of frequently), but ultimately it is completely their choice what they do. Not that he'd ask, but I'd give my dh the same line - his body, his choice. I think telling somebody else how often to wash/change their clothes is crossing a line.
Of course, you are completely within your own remit to tell him that you are more likely to have sex with him if he is freshly washed. But I do think it's a shame you are so put off by it, and I wouldn't like having conditions put on my 'acceptability' for sex personally. If my dh said, for instance, "I'm not going to have sex with you unless you're wearing matching underwear and red lipstick" I'd obviously laugh because he'd have to be joking I'd tell him to fuck off.
We're generally quite clean (everyday shower and fresh clothes), but I like it if dh is a bit sweaty (I find that musky, after a day's work, smell really attractive). If either of us super grubby we just don't do oral. Why do you think it matters to you so much that you can't have sex with him op?
I've just read upthread a bit and obviously going weeks without a wash is another issue entirely! 