you can shave both.
Yes, of course men can shave their pubic hair! Why not? It feels great ... just be careful not to cut yourself ;-)
Whenever they want. Not all women do though.
I cut any hair on the shaft itself right down to the base with scissors. Once its super-short, I then shave it with a electric shaver for a smooth finish. I also trim the rest of the hair surrounding...
No. It is there for a reason. Most men enjoy a full bush, or at least a significant amount of pubic hair on a woman.