Getting back to the OP: Anyone who thinks this quiz somehow provides a "teachable moment" is deluding themselves. It doesn't require awkwardly constructed sentences with obviously forced wording to get across the point that the English language is chock full of common words that have sexual double-meanings when used in certain ways. A really effective teacher would engage his students' creativity and stimulate them to provide their own examples of the concept rather than make use of this juvenile test.
I'm as accepting of human sexuality as anyone, but that doesn't mean I have to approve of this clumsy excuse for "innovative" teaching.
Well put, and thanks for trying to bring this back on topic.
Along with a host of other issues, this style of "teaching" has helped place America in its less than desirable ranking amongst the industrialized nations for education.