This isnt too pleasant - but on my breasts I get quite a lot of blocked pores and blackheads, incluing the occasional whitehead. Not only is this unsightly, it cant be too good for my skin either.
I remember hearing somebody mentioning laser to remove the small (blonde) hairs found on breasts may help this condition - might this be true? I am basing on this assumption on the fact that hair follicles may be the things that are getting blocked.