ButterMup

Friend, comrade, brother-man, I implore you with all possible gravity:
Do NOT Nair your package!

I would strongly urge you to avoid Nairing yourself anywhere between the waist and the knees at all...and for that matter, you may want to avoid application to your person, period, if your skin is at all sensitive.
Men just don't have the genetic birth-knowledge that women do, concerning how to properly use potentailly lethal chemical concotions to make ourselves pretty (and by properly, I mean "so as to not turn our recently deforested gentlebits into a landscape painfully similar to the surface of Mars").

I'm telling you as a concerned citizen whose personal experience with such unpleasant matters should be heeded. Please, do not make the mistakes I have made.
Leave Nair to the ladies, son - they wield it for more masterfully than do we - and either get that business professionally waxed, or keep on shaving.

(Sidebar: if you choose to keep shaving and ingrown hairs remain a problem, look for a product called "Tend Skin" in your local shaving-product purveyor's aisles. Shit works like a charm, it does.)