Aquarius and Aquarius share the air element: you meet in ideas. Conversation never runs out — plans, theories, inside jokes. The risk is living in your heads: this bond does well to ground things and say what's felt, not just what's thought.
Two fixed signs: loyalty that survives anything… and two stubborn heads. In agreement, nothing moves you — together you're immovable. In disagreement, nobody yields. Learning to let go first, even sometimes, is your lesson.