Yes, they can. When a person is pregnant, their body has a lot of growth hormones running through it to help the development of the baby. This affects other parts of the woman's body and many of them experience thicker hair, thicker nails, and other changes.
it makes your nails grow but it doesn't make it hard
No, but if you have fingernails and toe nails you are pregnant with a black baby.
nails
This is a simile comparing someone or something to nails. Nails are hard and tough, so this person or thing is being declared to be very hard and tough.
No.
Hard as Nails - 2007 is rated/received certificates of: Australia:M
It compares the the nail to how hard it is.
I don't see why not.
The cast of Hard as Nails - 2007 includes: Justin Fatica as himself
Hard As Nails - 2001 V is rated/received certificates of: USA:R
metal
once your nails are dry don't pick them or mess with them a lot and don't do anything that will be hard on your nails.