This is what I was thinking, it relieves stress and sex is an important aspect of social bonding in most highly intelligent animals. Even if it's not physically bad for you, mentally it can't help!

Here's a few notes on asexuality, for anyone interested. It's not the most inclusive page, but I wanted to link something that was as reliable a source as possible, and this comes from University of Michigan and Williams College.

Though some asexuality does stem from hormonal imbalances, the grand majority of asexuals (though the point in 5c is a little bit TOO defensive about it) experience normal hormone levels. I can't find any human studies with what I would consider to be high validity, but there are lots of individual cases in which people have had their hormones checked, which at the very least means that it's not a common point in all cases. There are psychological disorders associated with sexual anxiety as well, but again, these are generally not the norm and sufferers aren't necessarily asexual.

There are asexuals who don't abstain entirely from sex as well, though many do. I was just curious because many people are living full, happy lives without sexual contact, and in the particular case of asexuality where there is no sexual attraction, having sex can actually be a chore or something to put up with for the sake of their relationships. In which case, abstinence has mainly good effects for these people, as it removes that from their lives.

I'm a very sexual person, but I find that I'm usually able to focus better and stress less when I'm in a period of abstinence. I mean, the added stress and lack of focus is usually worth it for me, but physiologically, I don't think that abstinence has bad effects pour moi. So I was just curious. =)

To me, a lot of the arguments about sex doing X or Y are like the arguments about green tea doing X or Y. I did a pretty in-depth research project on tea last semester. There's not a lot of support that green tea on its own does even half of the things that it is claimed to in humans, but the /lifestyle/ associated with long term, frequent green tea drinkers can be correlated with a lot of health benefits. So it's fairly plausible imo that the lifestyle associated with having a fulfilling sex life (whether long-term monogamy or something else) is linked to health benefits in humans as well.