Two Dog/Aries together is a 95–100% mirror, the DoubleSign zodiac's most austerely self-assured Canine has met itself. Both halves believe in twinned souls separated at creation. Both halves are now standing in the same room. The labor is arguably done.
Chemistry is intense and slightly serious. Both Dog/Aries halves carry the Ram fire and the stern Canine commitment to eternal verities. The bedroom is loyal, athletic, and rarely casual. The risk: both halves can demand fealty hard enough that affection starts to feel like contractual obligation.
Conversation is direct, opinionated, and frequently a coronation of correctness. Both Dog/Aries halves have strong views about how lovers should behave. Listening loses to declaring. Real exchanges have to push past the urge to instruct each other.
Friction lives in matchmaking and inconstancy. Both halves want to fix the other's circle of friends. Both halves have austere standards. When one Dog/Aries judges the other's tribe, Ram horns lock fast.
What each Dog/Aries needs from the other is the lesson the canon already gave: don't ride friends and lovers too hard for their inconstancy. They can't help it. You can. Practice mercy on purpose, both of you.
At 95–100%, this is one of the most loyal, slightly austere pairings the formula scores. Two Dog/Aries build a fortress together. Just remember to invite people inside.