>>6545773Hey reasonable person,
You're a cool guy for being able to articulate a reason for why a waist swivel might be slightly useful, unlike these guys memeing for the past month are likely are butthurt over a random conversation.
And the option isn't there because they went with the extra hinge that gives them a wider range of motion to look upward, as flying, swimming, and climbing poses could use that hinge, especially for sexy poses comics are known for.