Why did the man propose to the woman working at the zoo?

She was a keeper.

Did You Know?

"Keeper" has a double meaning — zoo workers who care for animals are called keepers, but "she's a keeper" also means someone worth keeping in a relationship! Zookeepers form incredibly close bonds with their animals, often spending years building trust with the same individuals. Some elephant keepers can recognize over 100 different vocalizations from their herd!