If your penis is bent when erect, you will never be able to have sex properly.
FALSE: It's normal for a man's penis to curve slightly, and it's also normal for it to go to one side. This will not stop a man from enjoying or having sex. If you are worried about your or your partner's penis, or if sex hurts for either of you, talk to a doctor about it.
If men masturbate they'll use up all the sperm.
FALSE: Masturbating will not affect a man's ability to produce sperm, and he will not ”run out” of it – he produces sperm continuously. For some men it can take some time to ejaculate again after having sex. This is normal, and doesn't mean there is anything wrong with his sperm.
Men with big feet have big penises.
FALSE: The size of a man's feet do not reflect the size of his penis. If a man has small or large feet, this doesn't mean his penis will be the same.
Once a man is aroused and has an erection, he must ejaculate to avoid harmful physical effects.
FALSE: It is not harmful for a man – or woman – not to have sex. A man's testicles will not explode if he does not have an orgasm. Men produce sperm all the time, and if they don't ejaculate it is simply absorbed into their body.
The average penis length is 8-10cm.
TRUE: The average length of a non-erect penis is around 8-10cm. Penises come in all shapes and sizes, and the size doesn't affect how much you and your partner enjoy having sex. Knowing the things that make you and your partner feel good is more important than the size of your penis.
For more Facts and Myths check out: http://www.nhs.uk/Tools/Pages/sex-myths.aspx?Tag=Sexual+health+
All information was taken from: http://www.nhs.uk/Tools/Pages/sex-myths.aspx?Tag=Sexual+health+