Same thing applies when sharing a group or a user. Follow the same steps Tigger explained.♥
When you post the question, go back to it and click on share with a friend, from there you select all the friends that you want to share it with and click on their name, then on the bottom, you can write a message to them if you like. Then click submit. Done. Easy as pie. Hope this helps.
Go to your question which you want to ask and select share with a friend. A new window will appear showing your friends list, there you have select all option. Or you can select individually