STORY TIME!
When I was in my teen-early twenties, I was a complete arsehole. I like to think I'm less of a dickhead now.
For my fist year of uni I had a Japanese lady for a roomate. She was a snobby cunt and used to laugh at me with her friends, thinking I couldn't understand them (I did a GCSE equivalent in Japanese, so could understand much more than she thought I could), and considered me a filthy gaijin of the highest degree...so after a month or so of this, I did things.
I pissed in her teapot once a week. I made a spitoon out of a lucozade bottle and gobbed in it every time I got sick (I got tonsillitis a lot back then), leaving it open in our shared room while she was trying to eat. I took a shit on the worktop in front of her food cupboard. I had noisy sex with my boyfriend of the time when she was trying to sleep. I put eggs under her bedsheets so they'd break when she sat on the bed. I was a complete arsehead.
Eventually she lost her temper and confronted me, asking me why I was going this. I answered her in her own language, 'Because you called me a filthy, stupid gaijin.' Her jaw dropped as she realised that I could understand what she'd been saying...after that we called a truce and things were pointedly civil, yet tolerable, until I left at the end of the year.
I did loads of dickish shit at uni that I'm sure as hell not proud of, but I still get a little sick kick out of remembering Aki's mortified face.