This is a moral gray area, open to interpretation, unlike, say, murder. Reasonable people can disagree as to whether pre-marital sex is immoral or not.
Morally, I have a right to stand between you and my daughter.
Perhaps, but as consenting adults we have a moral right to exercise autonomy over our bodies. In fact, your interference with our autonomy (an autonomy that does not infringe on the moral rights of any third parties) would itself be an immoral act. Plus, you certainly wouldn't have a moral right to use force or threats to stop us in this situation.
If you impregnate her, there should be legal recoarse because in absence of it, we have free spirits running around creating kids that the rest of the world must foot the bill for.
And there is- sbe would be able to sue me for paternity. Though no system can force me to be a responsible father in that situation, it can at least force me to meet the bare minimum of responsibility by requiring me to pay my share. Otherwise, my immoral act (abandoning my child) would impose costs on third parties.
It's not a gray area. It is pretty black and white. Sex involves a commitment. The gray area is all the flapping about by people who don't want to be held responsible in any way for their actions. The gray area is the flack the rest of the world takes because of such things. The gray area is a lot of hurt feelings. The gray area is a lot of out of wedlock births that put a large percentage of our population on the public dime. Note I didn't say the government dime. The gray area is the path of destruction left behind smooth talking jerks and loose knivers.
Plus, you certainly wouldn't have a moral right to use force or threats to stop us in this situation.
I would have a moral right. Though I might not have a legal right. When actions taken threaten the welfare and interests of my family, I have every moral right. It's no different than national interest, pal.
And there is- sbe would be able to sue me for paternity
You mean if she can find you. If you can pay. If you show up to court. If you have a job... IF If If.. Isn't that where we are now. Cleaning up the mess left behind by deadbeat men and women. And you don't see a moral obligation there. Of course not, You talk just like worldly people who don't want to be held accountable for anything.