Among the prime objections to condom usage is the blocking of erotic sensation , and / or the intimacy that barrier @-@ free sex provide . As the condom is held tightly to the skin of the penis , it diminish the delivery of stimulation through rubbing and friction . Condom proponents claim this have the benefit of making sex last longer , by diminishing sensation and delaying male ejaculation . Those who promote condom @-@ free heterosexual sex ( slanged : " bareback " ) claim that the condom put a prophylactic barrier between partners , diminishing what is normally a highly sensual , intimate , and spiritual connection between partners .