See kids, when two tires really really like one another, they might decide to have "special time". And if one tire happens to be a boy tire, and the other is a girl tire, well sometimes the girl tire will end up with a little baby tire growing inside her and she will get a little bump like this! It's all perfectly natural and beautiful. However, if the two tires do not wish to make a baby tire at this time, or if they want to protect against ttd's (transportationally transmitted diseases), they should always remember to use retreads!
That's what this reminds me of