AITA for telling my aunt her new kitten looked like a scrotum?

My mom and I were visiting my uncle and his family yesterday.

My aunt just got a baby Sphinx cat. It is pink, hairless, and wrinkled.

She was going on and on about how beautiful it was.

I will be clear, it is a very cute kitten. I however think that expensive pets are a waste and that she could have adopted a rescue.

When we were having dinner she was sitting with the kitten in her lap still going on about it.

My uncle was rolling his eyes and my cousins were obviously getting tired of this as well.

When she asked me for the tenth time how cute I thought it was I told her it kind of looked like a scrotum.

My uncle laughed so hard he spit food all over the table. My one cousin also laughed but his little sister kept asking what a scrotum was.

At home my mom told me I was an asshole for using that word at the dinner table.

I stand by my comparison.