Penis originally meant "tail" and so was related to "brush", and only by extension was it made applicable to the "male sex organ" and it was in this sense that it was adopted into English as penis in the 17th century.
Pencil came through Old French pincel from Vulgar Latin penicellum, which is an alteration of Latin penicillum "paintbrush". This was a diminutive form of peniculus brush", which in turn was a diminutive of penis.
The carpenter used a pencil that was flat on one side so it would not roll off her workspace.
2. A small stick of medication or cosmetics for local application: The doctor gave her a pencil of antibiotic cream to put on the scratches of her arm.3. A gathering or mass of rays such as sunshine: A pencil of sunlight came through the wooden blinds of the window in the morning.
The traveling artist used a pencil to sketch the pensile banners in the church.
Karin created a fanciful picture which included a knight riding into the churchyard with a pensil waving from the point of his lance which was lighted by a pencil of sunshine streaming through the colored windows.
2. A short medicated stick, often of alum, applied to a cut to check bleeding.