Why do women that are a different race feel so over protective over their black boyfriends?

(I have no problem interracial relationships is just a genuine question. That I wonder i don't mean to offend anyone or sound Igronat ) Okay so everytime I'm in public as a (poc) and happen to see a couple that is interethnic. The woman of the relationship which is a different race always in a certain way cling onto they're spouse as if I would steal them it confuses me a lot rather if I accidentally bumped into them. Reality its conceivably but still it's kinda weird.