After just waking from crew rest, still feeling very sleepy, I was walking through the cabin. In the aisle seat was a lady with a newbornish baby, Feeling quite broody at the time i stopped and stroked the babies head. Much to the womans horror , she was breast feeding and i hadnt stroked his head but her right breast. Mortified, i actually swopped aisles as i couldnt face her for the rest of the flight.