I'm wondering whether anyone has ever cum underwater (in a speedo or whilst naked). I'm not sure if it's physically possibly though something tells me if enough effort was put in then an underwater ejaculation would be possible. Geoff ...

Moderator: DaveSpeedoEvans
It's already available, but in disguise. Called an outboard boat motor!In fact, I’m seriously thinking about designing a new type of Jacuzzi tub where you can sink into chin deep water with your butt sitting tightly against the back and a dome in the middle (with powerful water jets) to thrust your dick on. It would be a rather expensive sex toy, but there might well be a market for something like this.