My wife breast fed all three of our kids in public. She would cover herself with a blanket or towel. There's nothing wrong with it. It's perfectly natural. What's un-natural is our Puritan, it's a sex object way of thinking here in the US of A. One of my SILs (Sis In Laws) just had her second baby. She was uncomfortable breast feeding her first in front of me, but now, she covers the baby with a blanket and doesn't seem uncomfortable at all.
Of course, my pervy side says go ahead and look, it's out there, but I'm trying to keep him under lock and key more often.