A phonetic puzzle by Woody Rowe:

Across

1. What mosquitoes do.
2. What snakes do.
3. What dogs do.
4. What teeth do.

Down:

1. Insects
2. Optical organs
3. Annoy
4. Comfort

The solution:

Get it? Remarkably, the same idea works in French:

Across

1. Que font les moustiques
2. Que font les chiens
3. Que font les serpents
4. Que font les dents

Down

1. aime
2. au
3. air
4. dé