"Sex" per se isn't one of the languages, but "physical touch" is.
Here's a description:
Quote: A seasoned marriage counselor says people feel most loved in a marriage in one of five ways: quality time, words of affirmation, gifts, acts of service, and physical touch. Though we have a primary love language, we can learn a second language so that our spouse's needs are met. It's all about giving a little here and there, and accepting that our spouse's preferred channel may be different from ours. Though the author's life work is based on Christian principles, his ideas and personal style will resonate with people of all faiths and levels of involvement in organized religion. Whether your marriage needs a tune-up or a major overhaul, these are powerful prescriptions delivered by a genial, wise man.
and
Unhappiness in marriage often has a simple root cause: we speak different love languages, believes Dr. Gary Chapman. While working as a marriage counselor for more than 30 years, he identified five love languages: Words of Affirmation, Quality Time, Receiving Gifts, Acts of Service, and Physical Touch. In a friendly, often humorous style, he unpacks each one. Some husbands or wives may crave focused attention; another needs regular praise. Gifts are highly important to one spouse, while another sees fixing a leaky faucet, ironing a shirt, or cooking a meal as filling their "love tank." Some partners might find physical touch makes them feel valued: holding hands, giving back rubs, and sexual contact. Chapman illustrates each love language with real-life examples from his counseling practice.
