I don't know why you were downvoted for this because, at least in my town, this is completely true. The rate of single young[1] people getting pregnant is through the roof... and the attitude (from some young people I know personally) seems to be "whatever, fuck it"
On HN for 1310 days and you don't know why streptomycin was downvoted? Bit surprising.
It's because he or she offers no references or even any explanation of where this bold (if not just flat out wrong) claim comes from. Your supporting evidence, commonly derided as anecdata, is not much better.
[1] I mean 18 to 21 year olds.