Would you be weirded out if you found out your husband's face is tattooed on a guy's ass?

It's super random and came up about an hour ago. We are spending Christmas with my husbands grandparents and his sister (haven't seen her in 2 years. She just got sober) had gotten a tattoo and said to my husband "Isn't your face tattooed on a guy's butt?" Everyone laughed and I kind of fake laughed and it's apparently true. My husband and I have been together for 5 years and he never told me this story. The story is when he was 16 he hung out with a lot of older people who would by him alcohol and when drunk one of his friends dared another friend to get a tattoo of my husband's face on his ass. So this then 27 year old man got my then 16 year old husband's face tattooed on his ass. It's a bizarre thing to bring up at Christmas and his sister went and found the picture of my husband at 16 with his face close to the butt tattoo on this grown man to show the comparison. Everyone thinks it's funny. I find it weird and wonder why this never came up. My husband hasn't spoken to those people in over 10 years so he just forgot someone has his face on their butt? I'm just weirded out by it.