This magnet-penis was created for fun and on a 3D prototyping machine.
But since a lot of friends want one and I can't provide to each of them, so I share it here :p
You will need 3 magnets of diameter 6mm and 2 to 5 mm height (not provided here) and nicely stick it with any glue.
You can find the magnets on farnell for instance.
1.778 w x
2.982 d x
0.7 w x
1.174 d x