Optimistic impulse. Mars in Sagittarius jumps with faith, sorts it out on the way, and hates a fixed plan. Mars in the chart shows how you act, how you go after what you want, and how you react to conflict.
How do I find my Mars sign?
From your date, city and time of birth. Mars spends around two months in each sign, so the date alone settles it in most cases. AstroVibe calculates it free.
Is Mars about sex?
It is about desire, initiative and physical energy — which does include how you approach intimacy. Venus shows what attracts you; Mars shows how you go after it.
Does Mars explain why I always argue the same way?
Largely, yes. Your Mars sign describes your default conflict style: whether you go head-on, shut down, argue the point, or disappear.