Has any one caught their mate masterbating?

Story: we had a phone argument while I was at work which left me seething so I went home on lunch to cuss him out to feel better.when I opened the door ready to fuss there he was on the couch pants around his ankles laptop at his side shocked. I was so upset I acted like it wasn't there and kept fussing until it got distracting. He was like a deer in head lights...we laugh about it now but that day was a mess