I have addressed this elsewhere so apologies for those who have read a version of this before. If you wet shave, use hair conditioner, not soap, shampoo or shower gel. Go for a fresh disposable each time, after that save it for your legs, underarms etc. If you prefer to dry shave I suggest the Phillips
bikini Perfect (available from shops such as Boots in the UK) with the comb removed (and, maybe binned!)
With either option apply plenty of hair conditioner in the shower afterwards. This has worked for me for nearly 15 years. Good luck.
PS: if you stay shaved the increase in sensitivity is amazing (shh!).