2% milkstamp
When a woman milkstamps someone while she is wearing a bra but no shirt or torso covering clothing.
She gave me a 2% milkstamp so hard that the impression of her bra left marks on my face.
1/2 and 1/2 milkstamp
When a woman milkstamps someone while she is wearing a shirt or torso covering clothing but is not wearing a bra or any other brassiere like mammary restraint.
I loved that 1/2 and 1/2 milkstamp; I could feel her nipple against my cheek through her thin t-shirt.