sexual function is best when hormones in play are all balanced out: testosterone, estrogen, progesterone, prolactin

testosterone can drive up your estrogen and bring sexual function out of whack, deca can drive up prolactin and do the same.

You need to do a bloodtest and see what is out of balance and only then a efficient way of dealing with it is possible, otherwise it would be anybodies guess what needs to change. bloodwork shows all and is the only and best way