My sexual history went something like
Religious child->unaware of sex
Religious child-> 'ewww cooties' but unconscious sexual interest
Religious teenager-> masturbating but feeling sex before marriage is sinful
Religious teenager-> masturbating, ready for relationship
Young man in spiritual crisis-> masturbating, ready for relationship, everyone around me apparently ****ing 24/7
Young man in spiritual crisis-> everyone around me apparently ****ing while I have somehow lost any interest or pleasure from sex :/
Agnostic student-> strong interest in sex, frequent masturbation
Agnostic student-> finds porn-> 'forgive me father for I have sinned'-> more porn-> repeat-> Riku
Riku-> meets girl->hooks up with-> wants to sleep with her, cannot because she holds no-premarital sex rule-> sad frog-> release frustrations via porn-> discover cheating porn-> 'my gf is cheating?' -> feels good to fap anyway-> 'my gf is cheating' -> porn-> gf breaks up because 'you don't trust me' -> fap-> very sexually frustrated young man disillusioned to religion-> so much porn and fap
so I would say that lust, masturbation can ruin lives, and is a sin that in excess strips you of the higher virtues but goddamn it feels good