One in six women in the US have experienced an attempted or completed rape in their lifetime (src: https://www.ncjrs.gov/pdffiles/172837.pdf ). Is it worth potentially inducing PTSD symptoms to use that subject matter in this question? I'd say no.
It's not just PTSD, but trivializing the act in a word problem. I'm not sure the teacher meant it in a trivial way though. It could have been an awareness campaign gone wrong.
So it's 1 in 6 now? When I was in college the claim was 1 in 4. So I guess there's a silver lining there. Although some research asserts the ratio may be even smaller: