ixnay, atomic_princess! first up, replies in E&C are restricted to moderators and the people who asked the question only. Please keep your comments in the main forums unless you need to ask a question here.
secondly, you really don't understand the physiological events of lactation, and incidentally, neither do a lot of script writers (they have advisors in the profession, but that only goes so far).
During pregnancy, a woman starts to crank up levels of a hormone called prolactin. This helps prep the breasts for milk synthesis and secretion. A post-delivery drop in estrogen and progesterone cause prolactin levels to spike and milk synthesis goes into full swing.
Then, another hormone called oxytocin steps in. When oxytocin is released, it causes the actual milk ejection. Oxytocin is released during stimuli like a baby's suckling, or during orgasm, so during both of these activities, if a woman has enough prolactin, she can lactate. And if she doesn't have a baby, then it's weird and she needs to be seen by a doctor.
mundi faece repletum