More about Inuendo-a-thon
Start a conversation with someone (totally clueless or smart, your choice) and continuously use inuendos or euphamisms. You need to do at least ten. You could do this with a random stranger. e.g. Go up to a stranger and with a friend with 2 bannana, say you're arguing about who's is bigger. Improvise from there on. Don't laugh be 100% serious!