True story:

My best friend from high school, his younger sister and I were all at the beach one summer day. A tourist wanders over to us and asks us what the difference is between a hard-shell lobster and a soft-shell lobster. My best friend was a biology major who was working that summer for the local fishermen's co-op and he explained to the tourist that soft-shells had just shed their shells and hard-shells hadn't shed yet. The tourist decided to impress us local yokels with his big vocabulary and asked: "so they're lactating, right?" While his sister and I were rolling on the ground howling with laughter, Bernd managed to answer the tourist with: "No, I mean they're shedding!"