Answering from the female perspective, I would personally prefer to be shower fresh, or at least have had a shower not many hours beforehand, before having a guy go down on me. If I was totally unwashed and pungent I'd feel really self-conscious about it (although if the guy really didn't mind I'd soon get over that, I'm sure!)

My ex used to say I tasted too 'fresh' directly after a shower, but I never saw him trying to dive on me after a day out walking in sweaty hot weather either..

I hope more guys reply to this thread as it's something I've often wondered about, and it would be interesting to hear what more women think about it as well