VerSpanken masturbators feature an open-ended housing and snap closure, so the user controls the pressure. The design allows for a myriad of stroking techniques. The device has two foam inserts; this model's are wavy. The inserts can be replaced with WaterWieners that can be either warmed in a microwave or chilled in a refrigerator. By mixing inserts in the device, the user can combine temperatures, textures and/or densities (foam or water).