I read with great interest the article entitled: “ Waterpipe Smoking among Herat University Students: Prevalence, Attitudes, and Associated Factors” by Niazi et al. 1 They reported that 54. 1% of men and 81. 7% of women had used waterpipe for at least once, but, at the time of the study, 27. 0% of men and 7. 6% of women were considered as waterpipe users. Therefore, the prevalence of the current waterpipe users compared to usual waterpipe users in women shows a significant decrement compared to men. The authors failed to discuss this important decrement for female waterpipe users. Although they attributed this decrement to gather a smaller number of female university students compared to the male counterparts, this could not be the case; because the prevalence of usual use of waterpipe in females was higher before coming to Herat university. Its mean that females begin use of waterpipe during childhood or lower age, but they are not addicted as much as males....