I don't know if its just an autism thing but I dont understand why people like condiments.

Maybe? Us neurospicy folks are not a monolith. We've got the autism hat trick in our house, and the three of us have condiment quirks as follows:

1. Despises anything sweet unless it's accompanied by an intensely spicy component to balance it.
2. Sweet only. Ketchup is the high bar for what counts as sweet (probably because of all the corn syrup).
3. Ketchup. Full stop.