"He was thirteen, but it's okay if he liked it." (A couple people said that.)
Know what else thirteen year olds like? Pokemon, soda, and those tennis shoes that light up. Being able to get it up doesn't act as a measure of your mental or emotional capacity to handle what just happened. It's entirely likely that this could screw up his relationships/sexual encounters for the rest of his life.
The fact that sex and marriage used to be normal for little girls - 12 and 13, if not a bit younger - has been a great argument for pedophiles in the past, so, yeah, sure, I guess you can go ahead and throw a male kid's normal physical response to any stimulation (clothing, showering, pretty much anything post-puberty) under the bus with that one.
This is stupid, and sick. As someone mentioned, if some near-forty year old man had snuck into someone's house in the night to "rendezvous" with their thirteen year old daughter, they would've gone postal. The fact that people find this as funny as they do is just idiotic by comparison.
I have to agree with the weirdness of the lie, though. She lied about being 23 because she was 36? Both are illegal. A lot of people think that pedophilia can sometimes have something to do with wanting to maintain your own youth, so I'm guessing she was just trying to feel young. Whatever. She sure as hell better get jail time. I'm so sick of this crap.