English

Well, first of all, we wouldn't say I desire to do this. We'd say, I want to do this, or I like doing this.

They only mean the same thing if you want to do it because it's interesting. Just because doing something is 'interesting' doesn't necessarily mean you 'want' to do it.

If you're confused, consider that you're doing something you've never done before. Someone is showing you how to change the belt in your car. You may find it interesting, but it doesn't mean you want to do it again.

this is absolutely and extremely true

You might want to look up tautology while you're at it.

Yes Used quite a bit, I find. Annoying. Six a.m. in the morning. Past history.