Because they look positively beastly in stripes.
Because they used to be lumberjacks and they were okay.
Because that’s what the film industry says they have to wear. We all know that anything on screen is absolutely genuine.
Is the singular of “were wolves” “was wolf”?
I think it’s because plaid is considered so manly. Lesbians are also usually shown in plaid.
Werewolves used to work as lumberjacks, when in human form. It made it easier to slip out into the woods when things got “too hairy”. The only lesbian I ever met who wore plaid was my first wife.
John Deering and John Newcombe