All of us might have experienced getting heat waves and increased sweating from eating spicy food. Not really a great first date type of meal (been there done that).
Why this happens is because your body’s body temperature starts increasing as it is trying to fight the spicy chemicals from the food that you are eating. Signals are then sent to the brain, and the brain starts the process of trying to cool the body down by producing sweat from over a million different sweat glands (livestrong.com).
Eating spicy food is like asking for the sweating to start, and should be avoided if you feel uncomfortable sweating at the time you are eating. Eating spicy Indian food at home in your underwear tho is a different story.