The easiest way to let myself be irritated by my husband is practicing German with him. When he said something in a 'fast' speed(actuall it's slower than normal one), espeically numbers were involved, and my brain was a bit slow and couldn't recongize his words or misunderstood him, he would look at me very surprised and said:'I don't understand why you don't understand it'. It sounds I'm stupid. Though I'm actually stupid, speically at learning 'difficult' German, I still don't like this kind of tone and then I got irritated (and this approve 'I'm stupid' again). And I'm also tired of explaining why I didn't catch him, which feels like I'm confessing to a policman what kind of crime I did. Actually,in my opinion, the 'crime' I did is my ears are not used to these words yet. I wish I was an alien, or ET something, so I needn't learn any specific language that I still can communicate with all of people in the world by mind reading. Unfortunetly, I'm not.
It starts to let me feel stressed speaking German with him, and this already keeps me moody. I recall in the past I was a bit impatient with him when he couldn't follow my Chinese (sorry for that, but I think I'm improving it a lot, no?), so maybe it's the 'nemesis'?