We as physical therapists think this is very subjective. You don’t technically need to use lubricant but it can help in making sex more comfortable, fun and decreasing any discomfort/pain. In one recent study in the Journal of Sexual Medicine, out of 1000 participants, 65% of women had used lubricant in the past and of those only 20% had used in the past 30 days! Women’s use and perceptions of commercial lubricants: prevalence and characteristics in a nationally representative sample of American adults. In another study, women felt positively about lubricant use and preferred sex to feel more “wet” and were able to orgasm more easily using it.