"Tea Consent" -- Blue Seat Studios, 2017, 2:50 -- https://www.youtube.com/watch?v=oQbei5JGiT8
A must-show classic to accompany any lecture on sex. If you can understand why you shouldn't force someone to drink tea, then you can understand why you shouldn't force someone to engage in sex. No means no in any situation and a person can opt-out of sex at any time.