Post sex craving

So I'm just wondering if I am the only weirdo here with this issue, but it never fails, every time after sex I get this craving for something I can not explain. I feel it in my throat, I don't believe it's thirst. The best way I can explain it is like craving something carbonated or like a cigarette.. the intensity varies, but I always get it. Does anyone else get this, or help explain what I'm feeling?