Some people give that same types of warning with masturbation
nooooo you don't say! i was wondering why my brain wasn't quite normal. on second thought, maybe third and fourth, i was wondering why our male species aren't quite right in the head.
Huy, don't worry about the ki/chi/khi stuffs. give it a bit of time and ask again. and don't worry about the warning. you aren't going to have fire shooting out your ass and evil spirit entering your head (tau hoa nhap ma - the vietnamese terms). i am trying to visualize the whole image and failing. although, i had some mexican foods the other day that has habenero pepper. the next day i sweared there were fire shot out of my ass and i was screaming my head off.