Many kids regret that parents conceived them, kids as adults, when they grow up. If you'd listen to an average Joe, you could think that most people have perfect genes to pass, perfect upbringing to give and perfect overall package (they are so eager to reproduce and so "pro kids" that it just seems like that). While in truth many kids are being born to deformed (physically and psichologically) parents who become as deformed/skewed and are destined to live in a hell/suffer.
Only the best should reproduce (best health, best looks, best personalities, etc..), but that won't happen, because the worst are usualy the most desperate to "give birth", out of pure selfishness, pure egoism, just to make their kids suffer the same shit that they suffered, just to feel "fulfilled", regardless whether their kids will feel grateful for bringing them to this absurd world.
Basically every parent should regret it out of these who couldn't give their kids great looks, great family and good basis for a great success in life, every single one, because these who did (were lucky) and their kids who got these good qualities - will fuck in the butt all these poor bastards with lesser abilities/options.