Hey Dave — found this post by way of your Table of Contents and, yes, the title. I found the snail sex to be the most similar to human sex — well, depending on ones personal views on foreplay. Here’s a (long) video of snails copulating. Or it’s just nine minutes(!) of foreplay. Okay, maybe they aren’t as similar as I thought.

snail love

Be warned: slow emotionally wrought music included.