As mentioned before, I find it aggrevating that people constently ask WOMEN to not have sex. Males have a virginity too.
But the biggest reason I think things like sex have changed is partially because women and their freedom has changed. Most women were virgins when they married but many were married before their 20s when their sexuallity kicked in.
Nowadays, many women wait and date to find Mr. Right, but they have emotional, pysical and biological needs that they may need to take care of with someone they are not married to.
I personally feel that what needs to be said is that it's your body, but respect it. Don't have sex for the first time for the sake of having sex. And use the appropriate contraceptives, for both of your sakes.
I'll step off my soapbox now.
(PS, I am a girl IRL and were this man to step onto Canadian soil and I find out about it, he will be fed to my pet huskies)