How do I get my husband to stop going ‘Goblin Mode’ during sex?

TLDR; My husband says ‘Goblin Mode activated’ when we start to have sex, growls and acts like a caveman, and then says ‘Goblin Mode off’ when we stop, and then pretends not to remember afterward.

I really love my husband and he’s always been great in bed. But recently he’s been acting really weird. So, a couple of days ago, my son went on a rampage through our house and said he was in ‘Goblin Mode’. We didn’t really know what to do with him, so we sent him to live with my parents so he can go to a special needs school. My husband a really great relationship with our son and loved him more than anything.

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