Snails shoot love darts at one another. But you don't have to be a snail. People do it with their eyes and their tongue.
A sign of love is lightning in your eyes. Lightning is God's arrow. The tongue is also likened to an arrow. Shoot love darts to God.
Snails only shoot their love darts when close up to one another. Hardly able to see they feel the presence of the other. So for us and God.