It can be straight-up painful.. in a not sexy, owwwie, get the f away from me, standpoint.. in addition, a submissive yearns to be clean, or at least feel as though cleanliness is not a distraction..
With that being said, I have both enjoyed and hated it.. When it was good, it was really good.. Felt like his cock was rubbing my g-spot; clitoral stimulation is always nice *wags tail emphatically*