Yup, not weird at all. Peanut sauce is a staple for lots of peeps. Adding a little chili paste, brown sugar, and lime juice for dipping gingered yogurt marinated grilled rabbit or chicken skewers...priceless.
That said, we use Smuckers natural creamy peanut butter which is very good all by itself - some kid's peanut butters are probably made with lard or veg shortening, the natural stuff is probably better for cooking.
A lot of countries/regions use peanuts or peanut sauce for protein - Africa, Indonesia, etc.