You should have navigation aids on your site to help people move through your website without making them use the back and front buttons on the browser repeatedly. You can find navigation aids at the bottom of almost every single page in this site so that you can move through this site without having to go back to the home page every time. The only time you would have to go to the main page on this site is when you want to change the topic. You can have lots of different ways to help visitors move through your site, you can choose whichever one matches your site the best. It could be just forward and backward links or more detailed aids.