"Mankind," "Chairman" and "Freshman" are all taboo words in the world of gender studies.

If a student uses them she or he is liable to be admonished.
http://chronicle.com/article/Should-a-Syllabus-Ever-Tell/233479/?cid=at&utm_source=at&utm_medium=en 

 https://www.google.com/search?q=sexual+preference&espv=2&biw=1781&bih=1233&site=webhp&source=lnms&tbm=isch&sa=X&sqi=2&ved=0CAcQ_AUoAmoVChMIjpOZpdGeyAIVg1o-Ch0g1QQ3#imgrc=60dKr6-EWX9WEM%3A

This drives some conservatives nutty.
http://chronicle.com/article/Higher-Educations-Internet/232879/