"Don't think that you can have your fun and then go into a committed relationship and have the same experience as someone who saved themselves for marriage. You cannot have the best of both worlds."
That, IMO, is also an important factor in our rising divorce rates. I think it would be very difficult for a 30 year old woman who has had 10 or 15 "relationships" end badly to become a good wife. Doesn't help men, either.
IME, the absolute best sex, far and away, is when you and a woman you love are hoping she'll conceive. (From a man's perspective, of course.)
Bingo. You get a sense that "you'll be okay, that you will make it" and it makes you less willing to go through the worse when it happens, marriage vows notwithstanding. I know that there are atheists and agnostics who commit to marriages or other relationships and are faithful to their partners no matter what. But for me, it took my Christian faith to give me the standing to bear with my (current and for life) husband through some very tough and on-going challenges to our relationship.
May God bless your conception efforts and make you very fruitful!