one of my close friends at school was a JW. she had been bought up that way by her folks but her beliefs became a bit shaken when she had to watch her gran die.. her gran needed a blood transfusion and it's against their beliefs.
after that i had a discussion with one of the RE teachers to find out what the JW religion was all about...merely so i could understand my friend better. in a nutshell he said that they believe that God gave them their bodies and therefore they should not change anything in or about it in a medical way. i.e no cosmetic surgery, no blood transfusions. with the blood i think they felt that the blood of someone else wasn't clean but i might be making that bit up.
unlike Chrisitans they believe that jehova is still to come (Chrisitians believe that Jesus fulfilled this prophesy {as prophisised in the old testement})
the few times that we have had JW's come to the door, i've had a lively debate with them. offering them my bible to take and read.
dad also encountered them walking down the road and they walked after him preaching their views, eventually dad turned round and started preaching the gospels to them and they ran off. seems we are on the miss list now, because they haven't come knocking since.
we have a JW church in the village
edit: can't spell for toffee today