I've had red bumps on penis before i had sex they are small and have never gone away so it's not an std ..what is it? is it curable?

Unfortunately, : Unfortunately, without an examination, i can't really say what they are. You should give your doctor a call if they are changing or really bothering you. Otherwise, just have them take a look at your next physical. Hopefully, they will be able to identify the bumps and will let you know whether you need to be concerned. Good luck!