No
yes it is normal
Stimulate it.
yes they will be hard
Your eather horny or cold!
Like Chicken!
You get cold, or stimulate them mentally or physically.
Guys LOVE Hard Nipples. It Is Easier For Them To Suck On And Wrap Their Tongues Around!
Mine seem too!
About as harmful as getting a hard nipple.
yes, if this has happened you should also watch for infection
If your cat's nipple has fallen off, it may be a sign of a serious issue and you should consult a veterinarian immediately for proper diagnosis and treatment.
man i have the same thing but I'm only 12 and its in my left nipple..my dad says its puberty but i don't think it is