I hope that self posts are okay here - I've got a bendy back :)
imgur.com category @pm_your_pokemon_team
Bailey Brooke.... that arched back though..... dribbles a bit
imgur.com category @CaptainMemberBerry
Red tattooed lady on red... Oh, that back arch! [x-post /r/redlingerie]
imgur.com category @tominscv
yep, just arch your back and lean forward a little more. that will help.
imgur.com category @contemplatingboobs