Parents certainly do have different styles. My dad told me (in so many words), first off: save it until you get married. But if you do get her pregnant, don't come crying to me--nothing's fool proof; and don't look for me to protect you when her dad comes to kick your ass.
Similar to my approach. Save it until you get married. Monogamy + fidelity = about as safe a road as you can go. That said if you decide to do otherwise - don't be doubly stupid. And as you said - don't look for me to protect you from the consequences of your actions.