Put in some preliminary work on visual guide section of tag_group:sex_positions. That's been in plans for years, about time that it got started.

It's missing most of the positions, but I'll get around to expanding it... eventually. Finding good thumbs is hard, most are too visually cluttered (detailed backgrounds, etC) to be used in that way.

But anyway, noticed one thing while at it: do we really have no tag for the classic 'bodyguard' position? Both partners standing, facing the same direction, also known as 99. We do have the generic standing_sex tag, but that could really use some organization.

Maybe it's tagged as something else here...? If not, I'm gonna start tagging those as bodyguard_position, any objections?