Dr Lindsey Doe has a fantastic video about pubic hair growth which you can watch here. However, if you’d like to read about it instead of watch it, here are my answers to a few questions.

Question
Why do we have pubic hair?
Answer
For many reasons! To reduce friction, decrease skin abrasion and injury, protect from bacteria (like eyelashes protect our eyes, as Dr Doe pointed out), and a visible sign of puberty. (and more!)
Question
If pubic hair does all that, why is there such a big industry dedicated to removing it?
Answer
For many reasons! Well, sort of. The biggest ones for today’s society is embarrassment and fashion. We body-shame ourselves (and each other) into the belief that pubic hair is an awful thing to have. And with bikinis getting smaller, the likelihood of pubic hair being visible is higher than it was a century ago. Sports athletes often shave for sports reasons (you can tell I’m not a sports person, right?).
Of course, the hair removal industry is mostly centered around Western Europe and North America (Canada and the US, specifically). There are other cultures that don’t have a problem with pubic hair.
Question
Is it so bad to remove pubic hair?
Answer
It is up to you. Going through the hair removal process can cause small abrasions on your skin, allowing for bacteria to enter your body. It also increases chances of ingrown hairs, unless you use a high tech epilator. Being hairless (or mostly hairless) can mean that there is more friction during sex (or even just walking!), which can also cause injury to your skin. As Dr Doe says, if you wish to remove your hair, do it because you want to.
References
https://www.youtube.com/watch?v=hyITfS3MGFk
http://www.kevinmd.com/blog/2011/04/war-pubic-hair.html
https://en.wikipedia.org/wiki/Pubic_hair – I don’t usually recommend wikipedia articles, but this one has so many great sources that I can’t help but use it.