This is not about cost, it's choice to perform said actions. Our would you prefer to imply that poor people are inherently and by necessity more self concerned? I think that is a gross over simplification and removes accountability for ones actions. You're responsible for where you stick your ****.
Yes it is about cost..
Everything has a cost.....
You're responsible for where you put it, but if your opportunities are limited, because you have no resources.. ala OP.. the RATIONAL decision as a $0 income male is to put-it-everywhere he can..
It makes perfect sense..
And with regards to "sexual" responsibility.. It certainly used to be a problem, we needed monogamous arrangements to secure population growth and rearing..
THAT IS NOT a problem today.. Sex no longer needs the stringent "moral" regulation it once did.
We've exceeded the need for it.
Eh... If you have $0 it would be fiscally irresponsible to sew your wild oats in multiple wombs and thereby increase chances of creating another mouth to feed.
It's not even about morality, he's going to create an inherently disfavorable response by his actions that can make each of the girls quite unhappy. If you wish to relate it to dopamine levels, theirs will be negatively impacted.
We are not Ferengi, we are human, so the issue is much more involved than simple cost. Yes there is a cost to everything, but humans are complex creatures that need to be responsible for their own actions.
Infertility (OP shooting blanks)
Sudden infant death syndrome
Sudden fetal death
Falling down the stairs
Abortion
You can't make the statement with certainty that the OP's precarious activity will lead to children..
And even if it does lead to Children..
You can't say for certain that the kids won't become upstanding citizens in the future.
What if the OP had a gene for reduced cancer risk of some sort.. We wouldn't know this either..
There is no CERTAIN bad action.. The choice to be responsible is as arbitrary as it is to be irresponsible.
WE know that the Best Odds of a CERTAIN way of life may be H, but a percentage of pursuit for alternative J, should be tolerated, because complete uniformity and control is IMPOSSIBLE, with astronomical organizational costs.