Why Do Many Yogis Choose to Live in a Cave?

Many yogis and monks choose to go live in caves, up in mountain tops, or build monasteries far away from society. They become ascetics, hermits, luses. But have you noticed the negik reaction that you have against living on a mountain top, in a cave? A lot of you just have a negative reaction against this. It's because you've been brain washed by society into this thing called life.