Uh, am I just weird or something? At 40°C I still feel pretty much fine, a bit sluggish maybe. I don't get worried until I hit 41°C. And my 'normal' temp is kinda low: 36,5°C!
@TheHunter I do as well, so I don't see your point? Mouth is unhygienic, and anus is just for babies, right? Maybe those ear thermometers would be good, dunno.
@cor3zone
Dude, normal people begin to have a temperature at around 37°C, the baseline being around 36.
Over 39 is definitely abnormal for most people, and at 41 you usually need to get hospitalized.
Of course these limits vary from person to person, you know yourself better than anyone else.