used to get razor burn on my neck so bought a hair removal machine (was recommended by a guy that had same problem), the hairs have gone now so no more razor burn,
the hairs have literally disappeared tho! dont know how long for but shit could be forever :S
u may wana use it, just not on ur sack tho
link,
Boots Smooth Skin PLUS. Intense pulsed light permanent hair reduction. - Boots
peace and love biyatches