A:Do you want to get one, or give one?
No matter, you might as well learn. If you want one, your partner may very well want the other, anyway.
Get a copy of 'The Joy of Sex' and read through it. It should answer most of your questions. (It has illustrations in case you need extra help.)
After you've done that, if you still have a few unanswered questions you can look for the subsequent 'More Joy of Sex.'