An interesting article on how women carry the Y chromosomes (or DNA) of former lovers about in their bodies.
Link: http://www.amjmed.com/article/S0002-9343(05)00270-6/abstract
Which leads to a few questions & speculations, addressed here: http://jenapincott.com/do-you-carry-the-dna-of-your-former-lovers/
In a sense, though, if you've every done LSD or mushrooms, this should come as no surprise. We are all - at every scale and distance, inextricably intertwined, and our every interaction and idle thought shapes both ourselves and others. But if you haven't had that trip, well, consider this a little more proof to add to the pile...