I might add a couple thoughts......there is a big difference between "balance-point" wheelies and simple (though sometimes pretty lengthy) wheel lofts. BP wheelies generally take more skill (and risk) and should be learned VERY gradually--flipping a street bike at 50 to 75 MPH is not gonna end well for you. Learning these motorcycle control skills is made easier with dirt bike experience, but it's a control skill like any other, like threshold braking, aggressive countersteering techniques or hanging off and dragging your knee around a corner (preferably on a track I guess my 2 cents would be to never let your skill sets stagnate at a certain level. Wheelies are NOT risk-free but hell, neither is motorcycling.