Initially when dating and exploring each other protected sex is a must. I think it is a good idea to practice safe than take a chance. Once lines of communication and trust is established, then it would be a personal choice.

We have teenagers and when discussing sexual issues with them, we promote the ideal of safe sex. Our oldest son was starting to be sexually active at the age of 16.... we didn't approve, but we were of the frame of mind that he was probably going to continue so we had a sit down and discusses safe sex. We gave him condoms, I explained to him how to put one on (using a cucumber) etc. I also explained to him about a woman's cycle and what the times during that cycle that a woman could get pregnant.

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A blessed thing it is for any man or woman to have a friend, one human soul whom we can trust utterly, who knows the best and worst of us, and who loves us in spite of all our faults.