You are strong!

Yes it's true. You were the toughest and meanest among the millions and billions and gazillions of lil tadpoles that fought for survival! You fought, outshone them all and you were THE winner. Your competition was by no means pushovers, each of them with a big head, long tail and full of determination just like you did. Be proud. In fact, be very proud because not only were you the strongest among these millions of competitors, you were also the strongest sperm of the strongest sperm of the strongest sperm..etc.. of the first ever sperm!

Did that give you an extra boost of confidence for exams? I hope it did. =)

Ok, now let me burst that disillusioned bubble of yours by pointing out that there are only 6,525,170,263 others in the world just as strong. Some (actually many) just smarter, richer, and more good looking than you.