I have also called my parents' cousins "aunts" and "uncles" and that's even though I'm one of like three people in the world who understands things like what "3rd cousin, twice removed" means. It's just easier to say "aunt" or "uncle."
RE: 
Bluesky Social
mtsw (@mtsw.bsky.social)
Your dad's cousin is your aunt. I am from a family of plain boring white people and my kids call my wife's cousins who live around here and they s...