Don't expect this to be a fun, frivolous affair, because you, especially, get serious fast. If you have a problem to solve or a project to work on, together you give it a much more concentrated effort than you might on your own. Your lover probably comes to depend on your point of view if you are in a long-term relationship, because you give them such solid, practical advice.
This aspect could have a bit of a difficult side to it, as well; if they aren't used to being thorough in their thinking, they're challenged to think things through in a much more careful way. You point out the weak spots in their logic and require every idea they present to you to be solid, with ample proof backing it up. Does this get tiresome at times? Yes. But it could help them to develop mental skills that they use for the rest of their life. On the other hand, it's possible that this relationship ends up having a stifling effect on their more high-flying, unique and creative ideas. There is a general sense between you that you shouldn't spend time on anything that's not perfectly practical. Don't expect many flights of fancy in your conversations. Whether this aspect turns out to have an overall positive or negative effect is influenced by the other aspects between you, and how you handle this one.