She wants me to get a tattoo of her bite?

she saw a tick-tock of a couple getting each others bite marks as tattoos.
I'm not interested in that. We've dated 10 month, and I typically choose my tattoos very carefully. Plainly I think it looks dumb.

Anyway she keeps bugging me and getting sad and thinking I don't want her for the long haul.

How do I stop her from spiraling? And annoying me?
She wants me to get a tattoo of her bite?
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