help!

[acidtrix.livejournal.com]

This is very last minute and hopefully not too inappropriate, but i need to make a penis pinata for a bachelorette party on Saturday night. I figure it needs to be made tonight if i want to have any chance of it drying in time to decorate it. I'm not concerned about how to decorate it, or how to do paper mache; rather, i have no idea what to use as a form. balloons for testicles is obvious, but the rest of it is not so obvious (at least not to me...). 

any ideas??!

I made tshirts (well, designed tshirts) for the party but the damn photo hosting site i use is down... as soon as it comes up again i will post pics :)