You didn't know this at the time, but each time you lay an easter egg out of your tailhole, your body changes more and more, the following day you are still hiding in your house since you don't have any clothes and you don't want anyone to see you running around naked, but you suddenly get a another severe pain in your stomach as it fills up again, then you have to push the egg out of your colon, rectum and out your butthole and anus.
As you lay an easter egg out of your anus and it goes into the Easter Basket again. This time you feel some pain in your lower back and upper butt just above your human tailhole. You feel as though your coccyx or human tailbone is unfusing and it pops out of your lower back and upper butt just above your anus and it does. You feel pain as it rips through the skin, and you grow more vertebrae until it is a tail. The Tail vertebrae looks like it would make a teardrop shaped tail, then it grows nerves, muscle, fat, and skin on it and then it grows fur on it.
You go to the bathroom and see that you have a tail, but you are not convinced that it is yours, so you wiggle your butt to see if the tail wiggles as your butt does, and the tail does wiggle with your butt. "OH NO!" you say, you have a tail, a Rabbit's tail, you don't know why or how you got it, but you certainly have a bunny's Tail.