Just curious what does Meth feel like and what are the physiological effects on your body?

btw, I am talking like real pure stuff, so i dont want answers saying you should be more careful of the added stuff, I know that. I am NOT on drugs, and I will never be on drugs. I hate to admit it but I am posting it here due to the stereotype held that the gay community is riddled with drugs and drug abuse. But all stereotypes have to start somewhere. Right? ( the last bit is retorical)
I mean crystal, ice whatever. Not E or stuff