You try to run from the egg, but soon realize your mistake. With your udder stuck so tightly in your pants, there's no way the movement wouldn't stimulate it, and it almost immediately starts leaking milk down into them.
"NO!" you scream, terrified by what's happening now. You can feel the thick liquid slowly pouring not only into your pants, but into your underpants as well, gradually enveloping your genitals. You can feel it trickling around your penis, over your balls, covering it all. Finally, you can feel it moving, pushing, squeezing. Your sheer horror at what could be going on in your pants is more than enough to prevent you from looking down to investigate, and you find that all you can do is keep trying to escape while the liquid continues to swallow your manhood.
After a time, you stop running. You just can't do it anymore, you're too exhausted. While you've got the chance, you decide to take a peek into your pants, and (unsurprisingly) are VERY unhappy with what you see. Where once a slight above average penis and pair of testicles hung, you now see nothing. Not a bump showing your stuff underneath the latex, not an inward slit showing that your genitalia has changed, nothing. Just a flat expanse, devoid of either gender and bearing the familiar black and white cow pattern that you've come to know all to well.
Cow belly, cow chest, cow udder, and now no genitals? Where the heck is this going?!?