Questions Concerning Lactation

[GearRyu]

Intro
Hel-lo, BE section.

Working on scripting story, "Incubusted", in TG forum.
http://process.gtsdepot.net/forum/showthread.php?t=1536
Story involves instant TG/ slow&sudden BE.

Problem
I like working with a healthy degree of realism about the human body's functions and limits in my RPs and stories. Problems occurs with questions concerning BE et al, since not female myself, nor is BE et al the TG forum's specialty (therefore, asking questions in own story topic not feasible).

Question: How can sudden lactation best be described?

As I began drafting the third chapter (which involves lactation), a thought struck me: What would lactation FEEL like for a character? I do not know, but I would like to include it in my story, and therefore I want to have a somewhat realistic dealing with it. Difficulty locating information via Google and Wikipedia. Little relevancy.
Decided most expedient to put questions in BE forum, since BE/lactation is dealt with most often in this forum.

I do not think forum members? opinions on lactation process has been gathered. Should be fun to get opinions.

Background
After a certain action, the TGed character (whose breasts are large and growing; G+) experiences a sudden, unexpected milk production. Unaware it is lactation; however, it threatens to fill mammary glands to capacity, and automatically spill. Production stops automatically if certain action not frequently performed (resumes when action performed).

I realize much of people's opinion on the following is probably subjective and limited, based on their own experiences and ideals with the concepts of BE and lactation (it is the same for me). I am not calling on any of you as expert witnesses on the following. No pressure, only give opinion on the questions you are comfortable with. Will combine others opinions with own.

And, remember, the way the lactation works in the story affects how the story will go. ;-)

Build-up
What might sudden milk production feel like? Painful? Pleasurable? Current instinct says sudden build-up would feel painful. Might feel itchy about the nipples, when build-up seeks release.
How much might cup size increase?

Release
If the sudden build-up were somewhat painful, perhaps release would feel pleasurable. Perhaps very pleasurable?

Technicalities
What color is a female human's lactate? If forced by harsh and sudden squeezing, might it come as a trickle, or spray? How might it taste?

Thanks for reading. I eagerly anticipate your responses. Hope you look forward to Chapter 3