Having sex with a lactating woman (still full of breast milk)
"The milk train is comin round any time of night or day With two big headlights shining so you know the way
Picking up steam rolling down the track
Squirtin out juice on the caboose.
The brakeman's havin a heart attack"
"Man, I was riding the milk train last night. And I wasn't the only one who shot off. Don't go round hungry!"