I've never been called "bro" but "mate" is a reasonably common substitute for "love" so I wouldn't notice that. I am called "sir" at least a couple of times a year, usually by young women. I thought this was an interesting collection of photos of Albanian sworn virgins, mostly aging and having worked outdoors much of their lives:

http://www.slate.com/blogs/behold/2012/12/21/jill_peters_documenting_sworn_virgins_women_who_live_as_men_in_albania_photos.html

Thanks for the link to the photo challenge. I've asked for a card, although I can't post the results. You could post your favourite photos to glarmaco?