I'm concerned because my penis curves downwards like a banana when it's erect. There's no pain, and I don't have any issues except for the curvature. Is this something I should be worried about? Could it be affecting me in some way I don't realize?

A curved penis, especially when erect, is typically not a cause for concern if it doesnt cause pain, discomfort, or interfere with sexual function. This is often a natural variation in penis shape, which can occur due to factors like genetics or Peyronies disease, though the latter is usually associated with pain or difficulty during sex. Since you mention there's no pain or other issues, it's likely just a harmless curvature.