I think "this is interesting" might be a better introduction.
Also, in my experience, when people (especially teachers and professors) say "this is tricky", it is often in part or in whole because they are only giving you a partial explanation -- part of the picture.
It's "tricky", because they are telling you to accept certain things prima facie when actually (for me, at least) they'd make a hell of a lot more sense and be easier to absorb with a more complete description/explanation.
Some of the time, this is because they don't really understand the topic themselves. Other times, one or another pedagogical inclination or requirement makes them avoid a deeper discussion. ("I don't have time" or "We don't have time" or "That's beyond the scope".)
Also, in my experience, when people (especially teachers and professors) say "this is tricky", it is often in part or in whole because they are only giving you a partial explanation -- part of the picture.
It's "tricky", because they are telling you to accept certain things prima facie when actually (for me, at least) they'd make a hell of a lot more sense and be easier to absorb with a more complete description/explanation.
Some of the time, this is because they don't really understand the topic themselves. Other times, one or another pedagogical inclination or requirement makes them avoid a deeper discussion. ("I don't have time" or "We don't have time" or "That's beyond the scope".)