In the Sims 3, there is a hidden trait named “Immune to Fire.” Firefighters and Sims working in the Firefighter profession have a 50% chance of passing this trait on to their children. Sims with this trait cannot be killed by fire.
“Fire Fighters are able to survive countless fires; not least because of their natural immunity to fire. It’s a trait that they pass on to their children.”
Similarly, firefighters have a chance of passing the Pyromaniac trait on to their children. Sims with the Pyromaniac trait are able to turn any fruit into a flame fruit, start fires for a short time that do not destroy any objects, can survive for up to 3 in-game hours while on fire, and gain a positive moodlet while on fire.
