Was this rude of me to say ?

I was talking to my boyfriend last night and we went on the topic of getting hit on by people of the same sex. I told him “I always kind of wondered what it would be like to be with/have sex with another girl. I wouldn’t act on it but have wondered”

He joked “that’s why I always watch lesbian porn, so I can learn how it’s done”

Later I thought about it again and realized it might have been rude and hurt his feelings .