I think that men who want to keep on buying women things perpetually are trying to compensate for lacks in other areas without a doubt.
Could be that if the focus is on the generosity and kindness and making her feel really special in that way she won't be so bothered by the hidden disppointment in the other most important department.
It may be kind of a way to deflect the focus in the other 'lacking area' and to draw on other attributes displayed by the man to bring the women pleasure because she will not be otherwise satisfied.
That may be why the man persists in buying and bringing her things.