Why did god invent pubic hair?

Nice question to ask. I think I know the answer. For some reason, the genetilia have to be cool. Look at those infrared camera views in the national geographic channel, and you will see that there are cool regions between the legs of all the lions. The balls have to be cooler than the rest of the body for optimum conditions of sperm generation. For maintaining the temperature in summer time, the pubic hair is used. There are also supplementary things like sweating, which causes inconvenient things like intertrigo. Although the balls do retract into the stomach partially during winter for a little warmth. Then, the pubic hair traps sufficient warmth. Clever thing, this pubic hair is.