This is just a confirmation/refinement of something known for a very long time. I just finished reading http://www.amazon.com/Evolution-Desire-Revised-4/dp/04650080... , if you're interested in such stuff it's a really good book. Most of human "mating behaviour" is understood to a pretty amazing degree if you read the right things. Doesn't make actual mating any easier :p but it puts a lot of perspective into it.