My wife nurses me
I have been withe my 53 year old wife for 15 years now. She has always liked for me to suck on her tits, she likes it when I fall asleep sucking on them. She actually cums from this without even touching her pussy. After a few years of doing this nearly every night, I was surprised when she actually started lactating. She hadn't been pregnant for over 30 years. She went to her doctor, who told her it is common to lactate with continuous sucking on a woman's nipples, it's called induced lactation, and that it is nothing to worry about. Needless to say, we both enjoy this very much. It is a big turn on for me to drink milk from my wifes breasts.
Actually it is possible, but normally it would take an extreme amount of suckling. Also, normally medications are needed to assist in inducing lactation such as this. Parents that adopt children but want to breast feed sometimes induce lactation despite having not given birth.
Not possible
Oh, yes it is!