Human mind, good character, good heart... are all very fragile things, good one can be broken rather easily, a broken one can hardly ever be properly mended back without major cracks that keep coming back ie under stress or hardships.

Nothing is impossible and I talk about lets say rather about unprobable matters. If you want to take additional risks on top of usual risks with new relationships, be anyone's guests, but they are there.

Or maybe you don't care if you have a stable relationship (hardly ever the case but it happens), also fine. At the end, you can approach relationships as probability game, and folks normally want to tilt it in their favor.