Touch is a fundamental part of human existence. Studies on infants have shown the importance of regular, loving touch and holding on brain development. These benefits do not end in childhood. Life without physical contact with others is a lonely life indeed.
Studies have shown that affectionate touch actually boosts the body’s levels of oxytocin, a hormone that influences bonding and attachment. In a committed relationship between two adult partners, physical intercourse is often a cornerstone of the relationship. However, intercourse should not be the only method of physical intimacy in a relationship. Regular, affectionate touch—holding hands, hugging, or kissing—is equally important.
Be sensitive to what your partner likes. While touch is a key part of a healthy relationship, it’s important to take some time to find out what your partner really likes. Unwanted touching or inappropriate overtures can make the other person tense up and retreat—exactly what you don’t want.
Source : helpguide.org