Nipples and other body parts changing color?!

Jessica • 31! First time Mom. Due on 07/17/2017! ❤👶🏼
So....I was reading some today about women's nipples and labia becoming dark during pregnancy! Really?! I know nipples because the milk production, etc...but labia? Why? And if yours did, what did your significant other and/or husband say? It just seems weird to me 😊. Thanks guys!
FTM ❤️
Nobody answers questions on here anymore ):