Hello, when talking about premarital sex I never saw the following consideration:
Under ideal use the pill has a failure rate of 0.3% and condoms 2% per year. This would mean that under ideal use of both at the same time, the failure rate per year is 0.006%.
When 1 billion women and 1 billion men are sexual active this would mean 60000 unwanted people are born that are not welcome. So 60000 lives ruined! (The mathematics: 0.006/100*1000000000 = 60000)
However, under typical use the failure rate of the pill is 9% and condom 18%. So if used at the same time: 16200000 unwanted people!
Sex for fun is gambling with the lives of millions of people. Yes maybe you will not get pregnant, but if all people do this millions of peoples lives are ruined right from the start!