No more "abs" for the viewers?

Last Friday, I noticed Rainbow stopped showing their abs during Music Bank.
I guess it's for the sake of the younger viewers.
Although the authorities have long ago set an age limit at 15 years of age for the viewers but who can actually stop them from watching those spectacular music programmes (eg. M.Bank, M.Core, Inkigayo, Mnet Countdown and more) to witness their favourite majestic artists performing live?
Well, whether to show their abs or not, they still look as gorgeous as usual. Isn't it? =)

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