The labia are actually two sets of lips - the outer labia (labia majora) and the inner labia (labia minora). The inner labia are the smaller lips found just around the entrance to the vagina. The outer labia are the larger lips as pointed to in the diagram above. Both sets of labia are loaded with touch sensitive nerves (though not as densely as the clitoris) that respond well to stroking and touching. The labia are best stroked lightly but your partner may want slightly heavier contact as clit sex progresses.