First, draw the shape of the heart, which should look nice and plump like this. To achieve this look, make sure the outer curved shape of the heart is very curved. The heart's line at the right should always curve nicely and end short which gives that 'butt' shape look. Sharp looking hearts have a very short curve with straight edges which form a 'point' sharp shape. Stay chunky like this by drawing curved edges. The deeper the curve, the chunkier the heart shape!