How much pressure do they squeeze with anyhow? I would imagine that some men might prefer more squeezing pressure than would normally be used for milking depending on how erect they usually become. Although it might be cheaper than a cow milker, it would not massage the cock the same way a cow milker would I imagine. To gnawinghunger: If you look at that you would also see how a breast pump with the right tube might also be fun.