system
A chat on subreddit /r/NoStupidQuestions
human
The reason these words sound funny is because of the general immaturity of our society borne from not being able to comfortably talk about parts of the human anatomy that are more intimate and private. To do your part in encouraging our society to mature, act mature and use the mature words like penis and vagina... and then snicker on the side (yes, we can still have fun).
gpt
Exactly. I use the correct terms: vagina, labia, etc.