It is well documented that heat, sweat and bacteria form around the groin area and stay there for a long time if it becomes entrapped by pubic hair. By removing pubic hair entirely you are ensuring removing the barrier to your body that catches the bacteria. For this reason it is highly encouraged to find a happy medium - a routine which allows for some protection and maximum comfort
There are of course some wider benefits to trimming your pubic hair, there is a theory that a small bush makes your trunk look bigger! Should your trunk get put to work there has also been some research to suggest that skin around the penis is highly sensitive and having a bush blocking it can desensitise the experience.
It's worth noting that everyone and every body is different, whilst some prefer a shaven haven there will always be some who admire a shrouded log.