Your shirt collar and your neck
A bow tie.
bow tie for really fancy, tie for relatively relaxed
you can wear a bow tie i really don't know
yes
Not really. A bow tie is the classic accessory to wear with a tuxedo.
It really just is a fancy thing to wear.
Bow tie
no
If a black bow tie was worn with a white tuxedo it would make a great combination! The bow tie would really stand out and look great.
Absolutely! It looks much better than with a vest or with a shirt alone. Wear a conservative sweater and let the bow tie "pop".
HSBC
Yes, but only if you have a white, or lightly coloured collar or winged collar shirt. Never wear a bow tie which is the same colour as your shirt, only exception being if you are dressed in White tie dress code, which is white bow tie on a white wing collar shirt with black tailcoat.