Hi folks!
Unfortunately, we've had to remove the various responses to this thread, as by and large they've sucked.
Please keep in mind that /r/AskHistorians has very stringent standards in the content we'll take. Writing quality answers here can be quite a handful, so we encourage newer users to take the time to get your head around how we operate here before you give it a go.
Answering a question as wide and far reaching as this one is unfortunately pretty hard, since cultures around both bathing and sex varied enormously from place to place. A good answer takes technique and can't be rushed. /r/AskHistorians threads almost always get their result in good course, so please sit back, be patient, and let us work.