"First," I said to Old Sandy, "you and Dana have not drunk from the cistern."
"Does this have much to do with drinking the water?"
"This I can not explain," I continued, "Second, I tell you a thing, I study, live in a group dormitory, you know students, are very unclean, so the foot odor is very infectious. But there are always a few people who do not get foot fungus."
Lao Sha laughed: "We clearly said sticky fungus, why do you bring it back to foot odor?"
"Foot fungus is a fungal infection." I spread my hands, "Some people are not infected in any way, some people are the opposite, even the hands and face have grown ringworm scar, this is the reason why different people, the resistance to fungus is different."
"Dana and I are not infected," said Lao Sha, "Maybe it has something to do
