Smoke from exhaust..
White smoke is condensation, this is due to the combustion process creating water droplets and you notice it more on chill mornings,evenings.
Oil draining or rather seeping in through the inlet valve guide oil seal or running up the cylinder wall when on the side stand would produce 'blue' smoke.
When the engine is shut down there is a tiny amount of vacuum left over after the last induction stroke and this aids any residual oil to seep past the inlet valve stem oil seal, hence the smoke.
Most bikes and cars do this to a more or lesser degree, and on the boxer engine it is one reason for increased oil consumption.