Stop and think for a moment. For all of us, male and female, it starts in the mind. Yes, it is possible to get somebody's body to respond sexually without them being interested, it happens all the time in rape cases. That can only happen in the mind. In fact, when someone is sexually aroused in his or her mind, the body cannot refuse.
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.