Sex is a form of communication
Some people narrow their perception of what intimacy involves to just physical engagements, restricting their orgasmic threshold. Consequently, the liberation or expression of one's humanness through sexual pleasure isn't entirely satisfied, as the climax only goes as far as the sensations of the body. The relationship is, therefore, soulfully disabled along with sex that is hardly worth the stimulation.
Sex is a form of communication, and if you’re unwilling to communicate and connect - then there’s only so much you can experience and understand from another as well as yourself.