I can understand sexual desire, but is there really a "desire to have kids"? there is even a desire for kids without desire for sex. which can be filled with a

I can understand sexual desire, but is there really a "desire to have kids"? there is even a desire for kids without desire for sex. which can be filled with adoption. the desire that i don't understand or feel is the need to have kids to be my biological descendants i see my kids as given to me as a responsibility to raise and care for. regardless of our biological relationship. for me "i want kids" means "i want that responsibility"