I have no problem with seeing boobies on holiday, indeed, two years ago, I was treated to the sight of Miss Uma Thurman topless on a beach in St Barts in the West Indies (true...really).
However, I feel very uncomfortable when on holiday with female mates and seeing their 'bangers'.
I don't know why, but it doesn't seem to matter if it's a stranger, but when it's someone I know, my eyes suddenly fixate on something on the horizon, and I get all embarrassed.
Wow...another hang up...will wonders never cease.