Well, that complicates things.
You have YOUR vanities. Is it proper to say “the vanities are yours”?
The dog has HIS or her vanities. It has ITS vanities.
Mine Ours
Yours Yours
His/Hers/Its Theirs
I thought the saying was “Every Dog has his day”. But you say it’s “Every Dog has his vanity”? I’m just trying to catch up on the latest, ya’ know.