They usually just boil the worm.

Silk is a delicate material that we get from the silkworm. Specifically, we get it by boiling the bastards alive, which is a pretty mean thing to do.

However, it doesn’t have to be this way. There are methods for extracting silk that *don’t* include making the animal say goodbye to its friends and family, and while it makes the resultant fabric more expensive and of slightly reduced quality, it probably makes the wearer feel better about themselves (even though not boiling them only results in them living for about 3 more days).

Another way of obtaining silk that doesnt include boiling them
byu/magshag18 ininterestingasfuck