So does conceiving a baby outside of marriage and then paying to have him or her aborted. People are not things. Uncommitted sex treats them as if they are. It hurts them, and wrecks their self-respect as well as your own. If you treat others as sex objects and you exploit them for pleasure, you ll corrupt your character and degrade your own sexuality.
Good character includes honesty, fairness, decency, caring, self-control, etc.
If you start messing with sex before marriage, your self-control will suffer, and sex can almost take over your whole life. Sexual addictions are out of control today. Committing these acts poisons good character. When sexual relationships end, there s often a broken heart. This deep pain makes it hard to trust again.