No, I got the reference, it's just weird to have a topless girl reach behind her back for no discernable reason. I haven't watched Rozen Maiden through the whole way, but I don't think Rosa Mysticas are pulled from their backs.
They aren't, she just needs to be in that pose for the sake of the parody.
Your Rosa Mystica! Quick!Y, yes...Su... SuigintouShi... Shinku, let's not do it, after all...
...this sort of thing... ok?No way!In that case, reattach this right arm and make it so I can move it again!Sui・gin・tou!!Sui・gin・tou!!Shinku is down here