while there is evidence that is against that notion.
What "good reasons"?
Would love to see that evidence.
Because sex is fun and healthy?
Because it's a good thing to know if you're sexually compatible with your partner before committing?
Because you don't gain anything from waiting till marriage, especially not as a guy?
Because the whole "you shouldn't have sex before marriage" -nonsense is outdated and actually somewhat oppressive?
Because you're only young once and you might regret not living your youth to the fullest once you're old and committed to someone who turns out to be not all that sexually compatible with you?
Because monogamy is against our human nature and not having sex before marriage even more so?
The list goes on.