See the image on its own

Something Spock might’ve knocked up in his first year at the Vulcan Science Academy.

That’s what I think when I look at this graphic. Now. Two years after myself and Laura Sullivan created it for my infographic book Information Is Beautiful (US | UK).

It’s been updated and regraphicked. I’ve folded in some new types of relationships from this awesome diagram from Franklin Veaux (via QuietRiotGirl).
Types of Relationship | Franklin Veaux (thanks to Elizabeth Dunn for sending!)

Sexperts! Let us know if we’ve missed anything.