I don't think men use washcloths. I asked DH, and his answer was "sometimes". He doesn't stink, and I didn't want to explore further lest I'm forced to get a divorce. I did notice that he used a washcloth the night I asked, though. Maybe "sometimes" means "always before sex"? I'm just going to go with that.
I dont personally know any men who dont use a washcloth.
My husband doesn't. He always washes his undercarriage. He's clean and doesn't smell.