Mars in Leo puts their energy into acting, organizing and competing, and in a couple needs to feel admiration and respect. They like to lead and to stand out in what they do. When they feel watched, they can summon greater effort, so competitive activities tend to spark their enthusiasm.
They prefer the places and experiences they share to have some touch of distinction. Company also affects their physical energy: with others they may be very active; on their own, they might prefer to sleep or rest.
Wounded pride is a sensitive point. In the face of criticism or public mockery they may react intensely and demand respect. Taking care with how a disagreement is discussed helps keep it from becoming a humiliation, without their partner giving up expressing what they need.
When they feel admired and appreciated in the relationship, they enjoy family activities and find in them an occasion to share their energy.