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