besides the fact it may go against your religion, what is so wrong about premarital sex ?

As long as you are protecting yourself and know what you want out of the relationship ( i.e. Hookups or short/ long term relationships even marriage ) and the other person is on the same page. What's the big deal?? Why are girls slut shamed for wanting to have sex? It's a natural normal feeling and instinct for any human being. As long as you know the only way to not get pregnant and not contract stds/stis is to remain 100% abstinent, do whoever you want !!!