Hot and Cold

In the car I said I turned off the AC I was hot. I meant cold but said it wrong Matt corrects me and says "You turned AC off because you were hot?"
Me "Whatever, you know what I meant. I was cold."
Matt "You're hot and you're cold you're yes......" (quoting the song)
Kelsi from the back seat "You mean you're warm? Hot plus cold equals warm. Now you know so you will get it right."
Matt and I laugh and Matt says "You're awesome Kelsi."