FEW body parts are talked about as often as breasts.

We have a myriad of nicknames and slang terms for them, we talk about whether to breastfeed or not, discuss their size , shape and much more.

But even if you have breasts, certain aspects of them may still remain a mystery to you.

For example, have you ever wondered why your nipples get hard when you're cold? Or whether it's normal that one boob seems a cup size larger than the other?

From 'nipple orgasms' to whether size matters when it comes to breastfeeding and how babies can produce milk too, here are some weird and wonderful facts about breasts that you might not be aware of.

1. You don't have control over nipple erections

Your nipples are full of nerve endings which respond to stimulation, which can include touch and chan

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