Do you think parents should teach about both sexes?

Im just asking because my boyfriend is 20 and i told him i didnt want to pee at his house because they have thin toilet paper and its just gross and he goes "but girls dont have to wipe when they pee" and im just like bruh, and he goes "guys dont have to" and im just like "dude we do, trust me". He also didnt know we had 3 holes. My parents taught me most. The only thing I did not know before doing sexual things is that dicks get wet with precum. My boyfriend is 100% clueless because of his parents (that doesnt actually shock me though). But do you think parents should teach kids about both sexes? Not just their own? 

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