Basically there are six different types of touching:
1. Accidental touching—bumping into someone or being accidentally bumped.
2. Social touching—like greetings, respect and appreciation.
3. Friendship touching—between family and friends, showing concern and care.
4. Professional touching—coaches, doctors, nurses, beauticians, etc.
5. Intimacy touching—between lovers, like hugging, kissing, caressing.
6. Sexual touching—most intimate type of touching used for sexual arousal.