Commonly, women engage in displays of affection, such as kissing on the cheek or hugging. A kiss on the lips, a prolonged kiss or hug, or other forms of touching, may or may not be regarded as sexual. Sex educator and feminist Shere Hite stated that one of her female research subjects had written, "Sex with a woman includes: touching, kissing, smiling, looking serious, embracing, talking, digital intercourse, caressing, looking, cunnilingus, undressing, remembering later, making sounds, sometimes gently biting, sometimes crying, and breathing and sighing together."[2]