When a Yeep uses cotton to make something there actually using there own body to make those items this would mean things like pets And gadgets are actually made by our body.
more evidence this would explain why Yeeps die when the run out of cotton.
This would also mean cotton machines our a Yeeps life support sort of.
This picture shows the anatomy of a yeep ( unofficial sort of) and it shows that cotton is a Yeeps muscle for them
This would also explain why pets and the plush come alive there made from our muscles and skin!!!
( I say sort of official because we have never really gotten a official anatomy of a yeep but this was made by puff Bros)