Is it normal that i feel horny at night while chatting with a guy?

Sometimes I get horny at night (especially at night) when Im chatting with a guy that I like. Of course it happens when we are having a steamy conversation. Today I was not even thinking about sex and neither of us even mentioned sex, but I got so horny all of a sudden anyway. The conversation became steamy at that point because my horniness was obviously going to inspire that situation. I think my mind and body are trying to make me aware that I want him in every way possible.