First thing, I don't know if there's any conclusive evidence on this subject, but last thing I heard, frequent ejaculation actually reduces the chance of getting prostate cancer later in life. So men should definitely not hold back on masturbation/sex in that regard.
As for remaining pure until marriage, I don't see what the point is. It might create a stronger bond between two people if they're not allowed to have sex, but have to keep their hands of eachother, but I don't think it's something special. My girlfriend and I have had sex for almost as long as we've been together, and we have an incredible bond and a very mature relationship.
If you find a person you really want to be with, there's no reason the two of you can't have sex.
EDIT: And to clarify, when I say I don't think a bond created between two people waiting to have sex until after marriage is special, I mean it's not a unique bond. You can bond just as well in other ways.











