Well sure Stephen. I can only speak for ancient Egypt here. In ancient Egypt sex was seen as a sacred act yes, so much so, that the obelisk was an Egyptian symbol. The Egyptians didn't view adultery very highly, but besides that, any sex was pretty well "permissable", and sex certainly wasn't viewed as sinful if done outside marriage. Where as I've seen many Christians for example, and Muslims as well, say that the only time sex is pure is within marriage, and otherwise is filthy and a sin. There's a huge contrast between that, and most modern Pagans don't even see sex as an issue.