how people eat spicy foods ?!

Eating food depends upon their family members.if family members give them spicy food items from the baby then,it may be habits.and enjoy eating spicy food items. if they try to eat non spicy food items then, they may not be able to eat them . so it depends upon their culture or family.

It is something you can train yourself to. Friends of mine who don't like chilly sauce ( sambal ) at first but eager to try soon become addicted.

You get a glass of milk and eat them. The milk helps more than water. Water usually makes the food spicier (unless you're me).

You have to develop a tolerance for spicy foods..

Different cultures have different tastes. That's how.

They grew up with eating spicy food..

they grew up eating it and have got a tolerance of it