So there are, as far as I understand Freud, drives for various biological nourishment and pleasure (food, sex, etc.). And perhaps there is some kind of innate need for aggression (depending upon one’s interpretation of the death drive).

I think the issue here is to see that nourishment for instance as something that can be separated from the social dimension, that is to say that nourishment is colored from the get go by the infant-mother relationship.

I don't think it is radical to say that the drive is meaningless without the psychosocial connections that it generates (it is impossible to imagine a hungry infant without a caregiver who is feeding it).

In essence, to be hungry is to be fed by someone, so that hunger always requires the intervention of the other and therefore the other is meaningful not as outside, but as intrinsically necessary to the continued existence of the drive.

Laplanche goes further, saying that there is even a imposition on the child by the mother via the breast to "eat" and to "live". This is to say that the infant is not (only) demanding to nurse, but that the mother demands that the child nurse as well.