No where in the bible does it say that premarital sex is a sin specifically. This is simply a puritanical interpretation to prevent people from having premarital sex. Yeah it says one should marry rather than burn with passion but that is not direct. "Marry" has a different context in Aramaic than English. We truly do not know. Just like the bible does not say "Thou shalt not consume alcohol." Yet it is kinda a thing especially for more conservative Christians. I grew up with a Southern Baptist preacher as a dad and have read the bible from back to front, most cannot say that.

As with sex before marriage, "the bible no where specifically forbids or denounces masturbation. It does, of course, denounce all forms of sexual impurity and fantasies that would involve adulterous relationships whether actual or mental." Yeah I know the "spilling of the seed" passage but read the context. It is about Onan not fulfilling his family duty for providing an heir...

Also, If your right hand causes you to sin, cut it off and throw it away. We is whacking it a sin? It does not say it anywhere. Stealing is. So this makes more sense as a verse against stealing than pulling the pud.

Bible says nothing about blowjobs.