Most people choose B) y'know
Strange fact of life.
(mr-lizard Hell's teeth man!, Tue 22 Sep 2009, 11:37, 1 reply)

Several reasons for that:
1/ A dog cannot judge you: In fact, it will probably be glad of the attention - That said, so might the old man.

2/ Timing: I'd find it less of a hassle to stand in front of something annoying for 30m, than to stand facing something annoying for 60m.

3/ Hygiene: Whistling will probably throw tiny droplets of saliva right into your open mouth, which could carry any number of human pathogens right into a mucous membrane. The dog would, in theory, only face ordinary skin, lowering the risk of contacting any infection.

Or have I over-thought this?
(The Incredible Sulk Finally remembered his password on, Tue 22 Sep 2009, 12:40, closed)