Husband said off-handed comment that really disturbed me. Do you consider this a red flag?

After watching Game of Thrones I said "I wonder if they're gonna make the 15 year old bang the king. That would be really metal." He said "It would be. I would really enjoy seeing that."

He basically said he would enjoy watching a 60 year old man bang a 15 year old.
Husband said off-handed comment that really disturbed me. Do you consider this a red flag?
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