They were all at the bottom of the class!

Students at Harvard University were able to get answers to their most probing questions Tuesday, when the Ivy League institution hosted its annual “Anal Sex 101” class.

“It’s all about practice, practice, practice,” instructor Natasha advised scholars at the alma mater of Barack Obama, Bill Gates and Franklin Delano Roosevelt, according to a report from the College Fix.

Pupils at the nation’s No. 2 college learned how to relax their rectums and passed around butt plugs as they were schooled in the ins and outs of sodomy, the site reports.

“Not all men have penises, not all women have vaginas … the butthole is the great sexual equalizer. All humans have a butthole,” Natasha told the future leaders of America.

The class didn’t come with homework — but some lucky raffle winners did take home vibrators, and everyone walked away with free condoms and sex toy cleaners.

The workshop is part of Harvard’s annual Sex Week, and has been taught in the hallowed halls of learning since at least 2014. Other events on the schedule include “Kink 101” and “Beyond the Hub: Broadening Your Porn Horizons.”