I don't drink milk myself, so i'm not drawn to consuming the mammary output. In fact, the idea of putting my lips over a girl's heaving, milk-addled tits and drawing liquid from them doesn't offer me all that much stimulation. I have three very distinct, ever-increasingly degrading levels of interest surrounding a female's milk. I will refer to them, in ever more intense gradients, as the Skim, 2% and Whole milk tiers.
Skim milk
What i yearn to see, what is evident throughout the cloud of tangerine terms to the right, comes in the form of erotic auto-operation. I want to see the swollen-boobed maiden wrapping her hands around her tit and squeezing it, milking it, until a fine stream of alabaster liquid shoots from her erect nipple. As she gets into a rhythm, her palms mashing down on the meat of her breast, i find myself mentally directing her to aim the nozzle up into her mouth, struggling to catch every drop, in the hopes of not wasting a single savory morsel. To me, this is a purely feminine form of ejaculation. Yes, there are girls who "come" or squirt, but that is similar in geography and method to the boy version. However, the propulsion of lactose from an already highly-regarded, and female-specific area serves as an exclamation point to a feverishly aroused state.

In this stunning Shirow Masamune illustration, we see our highly sexualized cow girl literally orgasmic from the outpouring of calcified fluid. Those "guns" are at attention, and shooting endless rounds at will.
2% milk
What the previous tier presupposes is that the girl at the center of the pornography currently produces her own milk product. What if you have a girl who has not recently been or is not currently pregnant, and yet you feel the urge to recreate this sprinkler display? All one needs is a natural amount of sadism and a healthy dose of either domperidone or fenugreek. Coupled with a regular schedule of mechanical breast-pump application, and you can induce lactation in any mature female.
Immediately, even i have to take a pause at this idea. This is some very intense body modification, altering a female's frame to serve a completely different, albeit natural, profane purpose. The idea of a girl submitting to this is at the peak of erotic ideas for me. The reasons for why this is so incredibly impressive to me may not be immediately clear. That is most likely because i know what this leads to. As an intense sadist, i've already played out in my head the applications of this discovery, and in some offset ways experienced them. But because i have an unquenchable hunger, i push the possibilities further, to the next tier.
Whole milk
Which comes first:
the need to pump your tits to drain them of your milk or the need to pump your tits to encourage the production of milk?
There is no doubt in my mind that the Creator has a sadistic sensibility, i otherwise cannot explain the devilish convenience that comes with induced lactation. The process one must follow to trick the female body into creating milk (hormones/herbal supplements + regular mechanical pumping) is the very method one must employ once the first gush of creamy ejection occurs to maintain this state. A girl whose tits have been turned into milk factories must regularly pump in order to drain her milk bags - otherwise they fill with liquid and become swollen and quite painful. She has no choice but to give into the signals her body gives, sucking the milk out of her bosom, which only in turn sends a message to the dairy factories that more formula is needed. It's a vicious and gloriously evil cycle. What it amounts to is the transformation of a girl into a human cow. I have given many thoughts and even commands regarding what should be done with this cow juice, and yet the darkness of this fantasy never ceases to shock or excite.
When i first saw a clip of a bound girl attached to an industrial-grade milking machine, the horror and fascination tilted my cognition immediately towards the highly aroused level. I have since, after collecting well over 40 different such scenes, made it an immediate "drop what i'm doing" ultimatum whenever i've encountered another depiction of a poor submissive hooked up to a mindless vacuum machine sucking with a vengeance onto her dangling udders, slowly turning her into a helpless and writhing bovine.
