natural selection is da bomb. if you drive your car too fast and get killed. well, sorry to tell you, your ain't going to have kids that drive your b16a2 when they grow up either. cause one, you're dead to have kids, and two, youre b16a2 rocket is smucked.

no in all seriousness. you don't have to worry about natural selection. most major diseases cause sterility to some certain degree so thats that, but on a different level. lets just say you meet up with a chick thats got some cancer or disease but she's not sterile. but the fact that you know this. makes the fact that maybe you won't wanna continue the relationship with her (if you're shallow - har har) but you see what i mean. ok ok, in other words, attractive people are most likely the healthy ones too... you go figure it out from there.