Female dog

If you're referring to a stub of flesh and some hair - it's ok. It's supposed to protect the place, and is not a penis (though it does seem confusing).

If you notice no particular changes in her going or eating and drinking - I don't think there's any cause for concern. 

5 years is pretty grown up. Mine is less than 2 :-) 

I assume that this is something different than what she used to look like.  If it is a new growth, you should definitely get it checked out by your vet.  It could be a tumor or an infection of some sort.  whenever you notice a big change in your dog's body, you should get to your vet right away.  good luck!

my vet told me that my chhuahua is a female but also a men do to a new finding thing in her privet area