<human>: This happened last semester when I was studying abroad in Australia, keep in mind I'm American.

I was in class on the Tuesday before our first exam, about 15 minutes prior to lecture being over, my teacher wanted to do a quick exam overview. So she talked about the classic "there will be blah blah multiple choice and blah blah essays" but she ended with saying "I will provide your pencils, but you must bring your own rubber." At this point in time to me, a rubber was a condom, not an eraser. I absolutely lost it, burst out laughing thinking that our teacher just made a joke about how we were gonna get butt fucked by the test so we had to bring a condom. After about 30 seconds of hysterically laughing, the entire lecture of 100 people were silent and staring at me. I realized I fucked up. I quickly stood up, grabbed my bag, still laughing, and walked out. Needless to say I was a little bit embarrassed.

Summarize the given text in a few sentences.
<bot>: My teacher said bring a rubber to the test, thought she meant condom, burst out laughing in front of 100 or so people.