I have a diagnosis...you have "tosis!"
Lexi's new favorite show is called Doc McStuffins. Its about a girl that is a doctor for toys. Since then Lexi has been obsessed with playing doctor. On the show Doc always diagnosis her toys with words that end in -tosis, or -itits etc. When Lexi gives you a "chep up" (check up) she always says you have "tosis, Oh no, you need medicine." Then she gives you pretend medicine and then its her turn for you to give her a check up. After she has been cured from her "tosis" she sings the "I feel better song" from the show. It is hilarious! Poor Rav is often the patient and seems to have a tosis daily!