Why is Sonic the Hedgehog scared of water

he is scared of water if you have watched Sonic Underground or any earlier ones, sonic underground was aired on August 30, 1999 and in a lot of there episode's it state's that he has a fear of water, a terrible fear, in Sonic X it explain's why he has a fear of water so if you really want to know why he has a fear then go watch Sonic X and it's episode's