Why can you only swim butterfly?

REI: *makes noise of being stabbed*

RIN: Why hasn’t anyone taught you in the first place? If someone properly taught you to swim, you would be able to swim normally, right?

REI: *more stabbing noises*

RIN: These days even kindergarten kids can swim crawl.

REI: *stabbing intensifies*

RIN: Besides, theoretically it’s impossible for someone to only be able to swim butterfly.

REI: *screEEAAAAAAMS*

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