maybe 5 yrs old and above
so that they can develop thiers skills in swimming,thats could all
Most people start quite young, usually when they start kindergarten, although there are swimming classes for everyone of all ages! If you mean swimming lessons to practice swimming, you can probably start at any age. If you mean learning to float and stuff, probably when you are around 3 - 6
innate sexual organ-we cannot change it.
sexual response- of course it up to you if you want to change it or not.