Assuming that's a serious question... For example, colleges putting freshmen in all-male rooms or all-female rooms rather than randomly coed rooms is heteronormative. Gets modern students all het up and such.

Methinks perhaps I need to cut back on the sarcasm.

Seriously. That was not a term I was familiar with.
Nice to know they put a title to it.

See, there I go again! It's like a disease! I can't help myself!