Well you can know your limits. what you can and cant eat and how much your body can hold
1. you don’t want to be cut off from the world at all times. and even if you think someone else isn’t as clean as you’d like then you can take precautions and wash your hands after interacting.
I would go with B considering he has never tried it he is with a group of guys telling how great it is and he wouldn't want to feel left out of that circle
