Abstinence is fine until someone makes you WANT to do it.
Forced abstinence is like forced charity, or forced volunteering.
STDs are so rampant if you find someone who wants to have sex with you easily you have to wonder what you are opening yourself up to, down there.
Risk diseases, risk permanent diseases, risk pregnancy, risk cild support, risk murder/abortion, risk destroying relationships with others. Not to mention immorality. Very low upside with an overwhelming downside.