Breeding & Identifying the Sex of my fish

Question
I have 3 comets (goldfish) and was wondering if and how i could get them to breed? but first i need to know what sex they are how would i tell this?  

Answer
Hi Bec;

Here are some pages about sexing and breeding goldfish;

http://www.flippersandfins.net/goldfishfaq.htm#sexing
http://www.petshub.com/forums/showthread.php?t=11891
http://www.aqualandpetsplus.com/Live%20Food,%20Goldfish.htm
http://mike-edwardes.members.beeb.net/Cauratus.html#7

At Your Service;
Chris Robbins