Whilst most people don't like confrontation, there is something satisfying about having your first argument in Spanish. I had my first one, aged 22, in a Madrid market. I had asked for a quarter of queso manchego, which for argument's sake might have cost 2 euros 50, and the woman cut the cheese and it came to nearly five euros, because she had gone much closer to the half kilo. Being poor, I just couldn't afford to buy so much and felt cheated too, like I was being tricked into buying more than I needed to. I told her in my simple Spanish that I didn't want that much and she launched into some incomprehensible, fast Spanish. I remember going red and feeling upset and I don't remember if I bought the cheese or not, but I knew that I'd achieved something at any rate; I'd had my first argument in Spanish.
Can you remember when you first managed to get your point across in a similar way in Spanish and how did you feel?