I think it depends on the bloke - irrespective of age. I mean there are some fine specimens of 'youth' that you wouldn't want to see more than you have to...
However, I think flip flops are a tad too casual even for a casual business lunch or dress down at work. Mind you, some of the things some women wear to work would get them arrested. Then again, it's so warm and muggy in my office, I think I could wear a bikini and not feel chilly
and that's with so-called air conditioning...
Not quite sure flip flops work with jeans...
Don't they call flip flops something else in New Zealand? And what do Aussies call thongs then?
Smells lovely now - it's raining