Swinging on take off and the resultant ground loop, has caused many a problem for a novice (and not so novice!) aviator since someone thought that putting great whirling around things on the front of a flying machine.
A pokey tailwheel single, with a narrow undercarriage, and a relatively small rudder/fin area which is positioned relatively close to the centre of gravity (and hence with a small moment arm) will provide all the ingredients for entertaining handling.
Most folk are quite surprised when you tell them that when you have completed all your checks, and are lined up, and ready to go on the end of the runway, that the aircraft doesn't just track straight and true into the distance when you open the throttle all the way, and all you have to do is keep the rudder pointing straight.
Typically, most (but by no means all) aircraft have a prop which rotates clockwise when viewed from the pilot's seat, and if you are in a tailwheel aircraft the prop blade on the right side of the aircraft will have a higher angle of incidence (alpha) than the one on the left, causing an asymetric thrust to the left
The slipstream off the prop will wash over the fuselage, and end up acting more on one side of the fin/rudder than the other. Depending on the length of the fuselage, the airspeed, and the power setting, if you are unlucky, then this might kick the tail out to the right, and of course causes the aircraft to veer left.
When you do get rolling, and have enough air speed, the tail will rise, and that big whirly thing on the front will make its presence felt by acting like a big gyroscope, and try to twist the nose left.
The prop will normally be very inefficient at low air speeds, when you are just starting to roll, and only starts to bite once you get some speed on, when the prop bites, it tries to rotate the whole fuselage around the engine, and since you are still on the ground, and this can't happen, because the ground pushes back, the resultant force once again tries to make the aircraft go left.
Happily, the resultant of all these seperate forces acting on the aeroplane can be delt with by application of right rudder, although the effects of all the above are felt differently at different speeds, and the effectiveness of the rudder will work differently at different air speeds.
Basically, you have to be ready for the swings, and prompt in dealing with them. Some aircraft are so evil in their ground handling that they need a drag of brake at certain phases of takeoff to keep pointing straight.
Thats why when watching most WWII era fighters, you can see the pilot waving the rudder back and forth enthusiastically on take off and landing.