A beaver

A little girl, Janie is becoming inquisitive about life. One day she sees her mom in the shower and sees her vagina and says "Hey mom, what's that thing between your legs?". Her mom replies, "That's my beaver, honey". Not satisfied, the next day she wanders into the bathroom again and sees her older sister and asks the same question. Her sister says "That's my beaver, now get lost".
Next day, still unsure, and grandma is visiting for the weekend, Janie spies her in the shower too, and asks "Hey granny, what's that thing between your legs?" "Oh dear, Janie. That's my beaver", says granny. Janie thinks and says "Well you should have it put down, half its guts are hanging out!"