You can not abstain from sex if you occupy yourself with the thoughts of it , the devil will always provide someone that will assist you in sinning. By the way only few youths restrains from it cuz the devil as blinded us and changed our idea of what morals is, pre marital sex has become the norm...I'm no saint, cuz I've fallen short severly, only God's Grace keeps us . Guard your heart, and think of what matters and what will benefit your spirit, soul and body.