Grandpa Coach is and always has been a pansexual, he just doesn't know the word for it yet. He just knows he doesn't like to call it 'bi' because in his world gender binary need not apply, and it's not just humans he's hooked up with either after his wife died. (Vampires, demons, Jinn, other humanoid creatures) He was almost in a poly relationship if it weren't for the fact that he felt he could ruin a good thing by offering more than friendship to his best friend when he had a wife.
Coach is one of the main characters of my paranormal fantasy adventure webcomic found here: http://www.mymagicgrandpa.com

I did not draw this, it was a commission I got from ender-c-m on Deviantart