Re Share's "Also, and more importantly, I believe that a woman takes on a man's karma when they have intercourse.":
That's an intriguing speculation. Where have you encountered that suggestion before? (And why shouldn't a man take on a woman's karma when a couple make love?) Of course, the idea of a man and woman taking on each other's karmas can be used to make a case for fidelity in sexual relationships and to argue against promiscuity.
