No offence but isn't Ishita infertile so why is Raman even talking about population control? He could've said something else. I guess he gets carried away in the desire to throw in his penchant for one liners.
P. S. No one would be happier than me if tomorrow my IshRa have a baby of their own but if these jerks are shown staunchly against it then they shouldn't let their protagonist say stuff that invokes hope in a poor mere mortal like myself.