I hear that gaining obese fat cells will allow the body to increase aromatose production of oestrogen in the body. Is it possible that the body of an Eunuch without hormones increases body fat in order to supply estrogen?

The main cause that promote gain fat in an eunuch body seems to be the lower metabolism and not a try to supply any hormone. The only hormone source in eunuchs is the adrenal glands which produce the enough amount of hormones to survive when the gonads are absent