The Chinese says it drains sexual energy that you will not be able to call upon in you later years. (Who wants sex after 70 anyways.) But when you are young you have so damn much sexually energy and no pussy where you can put it. I tell my sons to save their sexual energy and spend it on sports or getting good grades in school. Both of these activities will make you popular in school with the girls. You will find that if you can get pussy when ever you want it, you are less likely to wack it, and you will make better decisions about sex also. (I think if you can get it when ever you wish, you are choosier about when and with whom you get it.)
As far was being healthy: That is feminist propaganda. They figure if men are wacking they won't be raping. I think men who don't wack it become better at making woman happy. I think sex is all about them. I find it more exciting thinking about what is going on with them then me. I realize this is a totally heterosexual view, but it is the only one I have. What other animal on this planet wacks it in the first place. They wait until their testosterone enrages them, kill off the other males and wait for the females to go into estrous.