Make sure you rinse well, soap left overs can bug you.
Use warm water and let it run over hte area for a bit to open the pours and stuff. If you aren't doing it in the shower or bath use a warm wash cloth for a few minutes.
Go slow and make sure you are shaving with the hairs not against them.
Apply a lotion that has minimal perfumes adn dyes to the area afterwards, or even anticeptic cream or ointment can help.
Another suggesting that your master may ot may not like is slowly move towards the total shave... start slow so you ody gets used to being shaved in that area and then slowly enlarge the area you are shaving.
Try one of those trimmers and just keep it short for a bit, until the skin gets used to having nothing much there to protect it and then move to shaving.
make sure you where comfortable cotton undies for a while when you first start to just your skin the ability to breathe.

You might have to deal with the razor burn for a little bit until the skin gets used to it, thats what I had to do at first... I am not fully shaved, but I keep it down to just a little bush. Shaving cream can be a major irratant as its not made for that area. I can't use shaving cream at all because hte perfumes and stuff acctually make me get razor burn. I am fine if just go slow and use a little shower gel or soap instead.