There's context behind this, I swear

Source: https://twitter.com/i/web/status/1331738091883782145

Can't believe I didn't tweet about this before, but DBZ: Kakarot has a part where Gohan literally wingmans Goku and Chi-Chi to go off and fuck so Goten can be born.

Source: https://twitter.com/Nortuet/status/1331709686312300545

I think this is when Gohan knew

Also, Goku likes getting pegged apparently.

Source: https://twitter.com/Nortuet/status/1331711373294886914