Social Skills

One day I hope my DS develops them. Sometimes he can be such a little turd. Today while walking with a neighbor and her 2 young children he kept invading the younger child's space whom he was sharing a wagon with (fix sent. later). He spit his water at the neighbor and then later poured some down her pants. Where does he get this obnoxious behavior. Once at home he proceeds to lose his mind over me not serving him yogurt (which he had slammed on the table causing some to spray out and then spat on). I swear sometimes he is unbelievable. Then he changes a 180 and is so sweet, ugh!!!