I was told when I was about 13 that I would get spots but they would be gone when I got to about 21. I'm pushing 40 and I have a spot on my chin so big it woke me up!
Also I was always being told that if you so much as think about a willy without wearing a condom then you will be pregnant within half an hour (not to mention having AIDS). Three sodding years of TTCing and not even a sniff of a blue line.
I'm beginning to doubt everything I was told as a teenager now.