As a personaal choice, I stopped breastfeeding both my girls around a year. I don't mind seeing a child breastfeeding up to two years of age. I absolutely do not think children should be allowed to breastfeed at alll period after they are 3 because that is just weird and gross and I actally believe that at that point it then turns into a psych issue, and a weird one at that because it's not the child with the psych issue but mommas.
Now once we become adults and we are breastfeeding for pleasure, or our men, or what have you, then age no longer is a factor. If your husband wants to breastfeed and it's something you both want to do, then by all means, have at it, lactating or not.
Oh how I miss the days of Doc nestling on me. That was very special time for the both of us.