Do you like slime? On this romantic day, perhaps you might enjoy learning about the extraordinary sex lives of slugs, courtesy of Sir David Attenborough. Feel free to take notes if you’d like to add this to your own repertoire.

And also consider the sex routines of snails, as recounted at Brain Pickings (video available at the website):

This is how it happens: When a snail finds a partner, the two face each other, gently touching their tentacles together to feel if they like each other. And if they do, they glide their bodies alongside one another in a slow double embrace, until their baby-making parts fit together like puzzle pieces. Then, they gently pierce each other with tiny spears called “love darts,” which contain their genes.