A childhood belief about skin

I used to have a large, black birthmark on my right leg that grew more hair than the surrounding skin. My older brother used to tell me that I have that mark because I was actually a monkey and that my parents had adopted me from the zoo and shaved me, but had forgotten to shave that one spot on my leg

The birthmark was removed when I was 12 for health reasons (It was believed to be cancerous). I told my brother that mom and dad finally shaved it off.