Ha ha, a Cancer, discreet and calm? What website did you look that up on? It is so wrong from what a Cancer usually is like… well, it might work, at least the calm part. Cancer is a water sign and is ruled by the Moon, which rules emotions and whatnot, so Cancers, like every other water sign, experience emotions deeply. Anyhow, Cancers and the 4th house are usually related to home, the past and childhood. So, a Cancer is pretty much somewhat of a homebody, not liking to go out much and prefers indoor activities. Also, like its symbol, the crab, Cancers like hiding in their shell and being rough around the edges, cause they feel vulnerable and insecure inside, and don’t want people to know that, so that’s why they might come off as cold at first, or even manipulative like you said, Pli. But I think they mostly want to be private and to have that privacy of being with themselves inside instead of sharing it with others. But I don’t know that much about the sign of Cancer and my interpretations of the signs are unorthodox, so I’d suggest you go to this website, it’s a very good and thorough one, get your birth chart done there, then click on Free Horoscopes > AstroClick Portrait and it will give you more insight into your birth chart. There are many other options you can choose from there too, to get to understand your birth chart better. You can also go to Free Horoscopes > Extended Chart Selection > Pullen/Astrolog > Chart Type: Simple Chart Delineation by Walter Pullen. I’m curious as to what other placements you have, but more about that later.
Also, @akafa123 and @thesorceress, you two can get started by getting your birth charts done at the website I recommended to Pli.