Shimashouka?

Something funny occurred during my Nihongo class today. Sensei was teaching us about the verb suru. "Shimashou!" he said, as an example. "It means, let's do it!" Then he added: "Shimashouka? — Shall we do it?" He suddenly noticed the other connotation of what he had just said, blushed, and covered his mouth with his hand. That was today's killer event.

I better write another post for the next thing I'll say.