Sherlock hasn't taken drugs since John offered to give his life for Sherlock's in the pool because now he knows that John is willing to die for him,he has a reason to stay clean to protect his friend.
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Sherlock Facts
RandomHere you'll get to know a few things you didn't or already know about the BBC show Sherlock.
#2
Sherlock hasn't taken drugs since John offered to give his life for Sherlock's in the pool because now he knows that John is willing to die for him,he has a reason to stay clean to protect his friend.