You can but don't wait too long or you'll lose your number. Maybe three days maximum, then you may have to start a new account and get a different number...
It is your preference. If you are on diet, you want to avoid cholesterol, saturated fats etc. But the point of this article is to avoid using oil, not cheese.
Yes, there is a chance that she can get pregnant. Even the pre-ejactulation fluids can carry semen. It's better to use birth control to prevent pregnancy.
