MERCURY CONJUNCT MARS 

The two of you are inclined to mentally spar with each other, challenging each other's ideas and aggressively confronting weaknesses, inconsistencies, or superficialities in each other's thinking. While this can sharpen your wits and improve your mental work, it may also lead to arguments, making you feel attacked and ridiculed by each other. Be wary of hurting each other's feelings or being overly zealous in challenging one another's ideas.

Interpretation is from the Relationship Report - get yours here.

Do you and your partner have Mercury conjunct Mars?