Any human being is capable of becoming sexually aroused without any physical contact. This is called fantasizing. In fact, humans are capable of become sexually aroused to the point of climax without any physical contact. On the other hand, it is impossible to become truly sexually aroused without thinking about it. Men on the other hand, being driven by testosterone, think about sex regularly, so it is very easy for them to become sexually aroused.
Women have a harder time becoming involved in sex on just a physical level.
That is because they recognize sex as an emotional activity taking place in the soul level. Men, on the other hand, start off tending to just look at sex on the physical level. Until their sexual need is met, they can't see past that point. However, once their physical need is met, men will become tired of sex just on the physical level. They won't know why it doesn't have the excitement that it did previously, but they will end up becoming dissatisfied with their sex life.