Conversation so far:
Why is Groucho Marx known for the mustache?
His distinctive appearance, carried over from his days in vaudeville, included quirks such as an exaggerated stooped posture, spectacles, cigar, and a thick greasepaint mustache and eyebrows.

Question: Was there a way that he curled his mustache?
Self-contained rewrite: Was there a way that Groucho Marx curled his mustache?