Dildos without Balls
I bet you never thought there was a perfectly good explanation why your dildo doesn't have balls.The first reason is that a penis with balls might not reach as deep as you want it to. A dildo that doesn't have balls for a handle, the shaft should be long enough to be able to hold during the deepest penetrations. Be aware of how deep you'll want to go with the straight dildo without balls.
Furthermore, a lady can tilt the end upwards slightly during self pleasure, which allows more comfort of the hands and arms while thrusting. Takes up much less space, easy to wrap in a towel for discreet storage and less material means a cheaper price for the customer in the end.