Sexual tension is often built through eye contact, smiles and small gestures that send signals to the other person about your interest. Touching can also be a way to build sexual tension, although it is not necessarily sexual in itself.
It can be a light touch on the arm or hand that sends an electric feeling through the body and increases sexual attraction. This non-physical foreplay can be incredibly effective as it allows you to build a strong emotional and intellectual connection with a partner before moving on to more intimate and sexual acts. It can also help create a sense of excitement and anticipation that only adds to the sexual arousal when you finally come together physically.