The main ones seem to be unplanned pregnancy and stds. What elss is there that's significant?
WHAT I DON'T KNOW WHAT COULD THE POSSIBLE RAMIFICATIONS OF HAVING SEX WITH SOMEONE WHO ISN'T EMOTIONALLY MATURE ENOUGH TO BE HAVING SEX I JUST DON'T KNOW WHAT IS PSYCHOLOGY WHAT ARE PEOPLE WHAT IS CONSENT?
Why do they need to be emotionally mature, we're talking about sex, not a relationship. Do you think they're going to go insane and start stalking their partner like in Fatal Attraction
As for consent, Consent in its most literal definition just means the peraon is ok wih it and has said as much. There's also a legal definition that also mandates additional red tape, such as he age requirement I mentioned earlier (there's also a sobriety requirement in some places)
I understand however that this is probably not what you were thinking of. Though what you were thinking of I don't know. I believe that you don't know either, and want me to accept that it just is because that is what society has told us rather than pursuing it furher.
I believe that you have bought into the line thatnsex is somehow special or sacred or indeed anything more than a basic biological function performed even by lowly worms and rats (who I might add, don't seem to be any worse off in that regard despite their lack of civilization and greatly sub-human capacity for decision making)