I once made a replica cock with plaster of paris and my well oiled cock. Just make sure you shave first otherwise getting yourself out of the mould can be painful. I used resin to create a cock replica before the plaster set too hard to break it out. I dipped the resin replica in liquid latex rubber a few times to make a rubber mould that could be used for casting a new replica. I would advise your girlfriend/boyfriend to strip down to "assist" during the initial mould making... plaster of paris takes about 3 to 5 minutes to set and keep your shape.

You can use the latex moulds to make soap cocks, chocolate cocks, rubber cocks, resin cocks, whatever you fancy...

yeah the same guy gave me money aswell....two times even and i failed both times...doing it along is really hard

Once when I didn't use it for a while it got moldy... does that count?