pesticides are known to cause alzheimers, and my wife tells me a lot of shit I don't remember at all and it just worries me very much that I may have it. Freaks me the fuck out
That stuff is almost entirely genetic. Do you have a family history? Matters much much more.
As to coffee, it all pretty much tastes the same to me as I am straight, the taste doesn't really move my needle, and in that i consider myself blessed.