Title and Thread mismatch.
This is not about the correct way to wear undies, it is about how
you position your kkc.
In Position A, it will later due to sitting down and standing up,
it will slide to the left or right, and it will point left or
right.
Position B, is best when relaxed. But when you are aroused, it will
get uncomfortable.
Best let it hang naturally, don't wear tight fitting undies.
This position question is best for those who are going
swiming/cycling, and wear tight spandex.
How?
Up, ppl can see the shape of your dick.
Down, ppl see the bulge.