Ok, here we go...did a little bit of research.
Menthols and cloves are RUMORED to contain fiberglass for the purpose of making micro cuts in the smoker's throat and mouth for more and quicker absorbtion of nicotine. People assumed this to be true because of two reasons:
1) People thought that there were these fiberglass additives because they figured there were additives in the cigarettes since they were not just tobacco...keep in mind that ALL cigarettes (in the US) have something like 600 things added to 'em.
and
2) Cloves and Menthols tend to numb the throat so the smoker can take fatter hits, get more stuff in the lungs.
Ok, thanks...everyone should try not to smoke too much I guess.