Hermaphrodisiac
Combining hermaphrodite and aphrodisiac not only makes my veiny 3 inch dick hard but it refers to when you are fucking the shit outta a ladyboy and can't seem to get enough of that sweet pussy and meaty cock or penis.
I was playing Scrabble with my Grandma and played the word Hermaphrodisiac. I defined it for her and she said it reminded her of Grandpa.