When you are young pre-heating an oven takes too long. At least it did for me. I would buy a frozen pizza, turn the oven on, and throw it in because I had better things to do than wait for an oven to warm up. There were times I would try to add toppings to my frozen pizza, resulting in a pizza that was soggy in the center. I now know, after several mishaps, that the only thing you can successfully add to a frozen pizza is a small amount of cheese and a few pepperoni otherwise the crust is ruined. One of the things I’ve noticed about getting older is that I can finally wait for an oven to pre-heat. I understand that if I do this, it really does only take 20 minutes to cook just like the box indicates. I also have the patience to use the timer that comes built into the oven. My frozen pizzas are perfect every time! I didn’t have the time to stop and set that thing in my 20’s, it took me years to get here. Clearly I still have a lot of growing up to do, because I believe frozen pizza is a perfectly suitable dinner…..