'My Family' Stickers

I quite often see private cars with 'my family' stickers on their rear windows in Melbourne. They display their family members, pets, etc.

The other day I smiled at the stickers on the car in front of me, when I parked my car on the street.

The sticker showed a small empty space between the father and 3 boys, and I realized a hand written arrow mark was drawn there with the words 'Now recruiting' I thought this was a novel way to advertise for a new partner.