You should definitely add a "Reply" button on people who make a topic and ask a question. For those who answer, they're should be a reply button, so one can post on their own question or anything else. It's only available on others posts, but not our own. I read a response to a couple of posts I made, but couldn't reply to anything, but you can do it on other's responses. I think you should add this option. Just a much simpler suggestion and convenient too!