I am making plans to hide some small blades inside of the sofa.
What is the purpose of stashing sharp blades in the sofa?
I just think that something like this would be fun.
A sofa is no place to stash your blades, as this is a spot where people sit and will be exposed to cuts thereby. You should put your sharp blades away in a cabinet.
I don't think there is any way someone could get hurt.
It would be really bad if someone sat on these blades and ended up getting hurt. You are better off thinking twice about doing something like putting blades into a couch to be honest.