Is one allowed to knock on the door with the key, knock on the window, use an electric bell, and have a little bell...
Understanding When One May Bite Off or Pull Off Part of Their Nail. What Should One Do When Needing to Remove Dead Skin?;
Introduction to the Concept of עובדא דחול (Uvda d'Chol) in Relation to the Melacha of M'AMER;