How many senses are there?

Balance? I mean, c'mon people. You have a pair of organs for it and everything. If anything, that's backwards, and it would be better to say that taste is a specialized form of smell. But, as it turns out, taste and smell operate differently.The sense of taste operates in two ways: the detection of salty and sour through ion channels, and the detection of sweet, bitter, and umami through g-protien coupled receptors. On the other hand, olfaction (the sense of smell) operates through (it is believed) the detection of the frequencies of vibration of odor molecules in the infrared range by electron tunneling.Furthermore there's the sense of spiciness, which is the irritation of mucus membranes in the mouth, throat, and nose by capcaicin; as well as the astringent sensation produced by the same irritation of membranes by the mustard oils found in (duh) mustards and horseradish/wasabi. Actually there's a number of "taste" sensations produced by means that have nothing to do with taste buds but rather chemical/tactile sensations in the mouth; fizziness, the tingle of ginger, the vapor of eucalyptus and vanilla, the burn of onion, etc. "Taste" doesn't seem to be the right word for those because you can detect them with your eye membranes too. (Ouch.)There's the sense of pain, which is not really a tactile sensation as it has its own nerve system. Consider the pain of an organ, or an upset stomach. Or a headache.Can anyone else hear when a CRT screen is on? I can and it often drives me nuts. I know I'm not hearing it with my ears, though. How am I recieving that sensation?There's the sense of gravity, I guess - how much force you have to exert with your muscles to lift something, or to lift yourself. That might simply be part of proprioception.