1 Follow Kathy Ruddy films Lorraine Henry fitting a crotch curve to make your own custom pants. Lorraine demonstrates how to use a flex curve crotch pattern to a pants pattern. Fitting a Crotch Curve for Pants11/05/2011 in clothes / crotch / curve / fitting / pattern tagged clothes / crotch / curve / fitting / Lorraine Henry / pattern by KRuddy