Okay, I know the Submission theme says Human and the species says Dragon/Other and the Gender says Multiple Characters, so here's the reason:

That's my back (Human), the dragon is supposed to be my brother, Gabriel (Dragon/Other), and I'm a female, you know, those creatures with a vagina and boobs and my Gabriel is a male, you know, those other creatures with a penis and balls.

This was actually my 18th birthday present from my mom. On that day, Gabriel had open heart surgery, so since we both loved dragons, I got this tattoo for him.