Today my oldest came up to me, and asked "Dad, whats a condom?" I told him to ask his mom, she told him to ask your dad.. i told him to ask me in a bit - so I talked to my wife and asked her should i have the old sex talk with him.. she thought it would be a good idea, he is only 12. So I had to explain the condom, and i told him how to use it and i told him make sure to always use one. Until your 25 at least, then you can have sex with it off, only once. Then wear it for the rest of your life, haha.
^
That was a long story short.