<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Do you eat them all the time , </div></BLOCKQUOTE>
The confusion I think stems from the fact that not all sausage is made in edible casings. For those that are, yes, one eats them in most cases. Sausages that are cooked (either before or after purchase (hot dogs, bratwurst, Italian sausage, kielbasa, et al.) are made with edible casings. Those that re purchased or made fresh (uncooked) can be squeezed out of their casings when desired, and cooked loosely or formed into patties, mixed with other ingredients for stuffings, etc., before cooking.
There are sausages made in inedible casings. Many of these are cured, dried sausages. The casing is meant to be removed before eating.