Pros of sucking the strap:
You don't gotta worry about your teeth
You can keep going as long as you want
You can pick your favorite shape and size until it hits the back of your throat and turns your brain off perfectly
You'll look like such a good puppy slobbering on their strap for fun and drooling all over yourself like a slut, lubing it up for more fun
If it's a squirting one then they can cum as much as they want straight down your slutty throat until you're completely cumdrunk
Cons:
Literally none















