My opinion regarding parental duty and financial support, namely enforceable support, is that it’s not a clear cut subject, both practically and in a moral sense.
When two people have sexual relations, there is scope for it to be for pleasure alone, with no procreative intention what so ever. This would be strongly implied by the implementation/agreement of contraception by both people. Any pregnancy that might thereafter occur would be accidental, an incidental outcome of the interaction as opposed to a principle one. I think the motive behind sex by both parties is an important factor to consider when discussing what each person actually agreed to, and therefore what can be reasonably expected of them, or enforced upon them regarding something like child support.
Of course there's a small risk, known to people, but as a rule contraception is incredibly effective, and i think its defendable for someone to engage in protected sex whilst not being prepared to agree to protracted upbringing and support of a child. Or rather that such an agreement can't be inferred from the mere participation in said protected sex. Perhaps if success rates were as low as 40%, one could expect greater responsibility in its engagement.
I think that to engage in protected sex with someone for casual/pleasure reasons, it’s not unreasonable to assume that both parties therefor imply an express opposition to getting pregnant. Should it then occur, through accident or due to malfunction, i think it’s reasonable for one person to assume the same opposition to pregnancy exists, and that it would be rectified early on, provided that there were no personal, cultural or circumstantial reasons to assume otherwise, and that these were reasonably foreseeable. For the female to decide to subsequently keep the child, that’s pretty much changing the terms, which should factor in to the rights and responsibilities of the male.
In the context of legally recognised gender equality i think it can be argued with some strength that men should have the same human right to relinquish all future parental rights and financial responsibility at an early stage, leaving the female with the same choices regarding her own future and body as she did before. I at least dont see it as an easy conclusion that the male partner should automatically be forced to support something he might never have agreed to, and to be so easily the target of loaded language and insults like 'manning up' and 'dead-beat' should such a status quo be challenged. It doesnt strike me as perfectly fair, and something worth the attention of genuine and thoughful review.
Being an issue best examined case by case, i can see plenty of situations where men who really should be there supporting try and get out of it, and shame on them, but i also see poor sods getting forced to pay 20 odd years of support (which is damn significant), for very unfair reasons. Obviously a system will have certain minor failures, which is to be expected, but a blanket rule to enforce male partners to financially support whatever seems like a pretty large sacrifice on the part of male rights.
On the flip side of things however, from the perspective of the child to-be, i can understand a strong argument that appeals to the human rights of the child to have a certain quality of life, and the common responsibility of that falling to the parents, and being enforceable to protect the child’s wellbeing.
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