ooohhh.....interesting.
It reminds me of a story my mum told me once. She was looking after my aunty's baby (her sister in law's baby) but they were like sisters, known each other since little. And they both had boys at the same age. Anyway, her nephew would not stop crying and was hungry and my aunty was late. Mum didn't know what to do so she breast fed him a bit. She thought it would be ok but said she felt really weird and grossed out by it and it just felt wrong. She said she only gave him a little bit to stop him crying and never told my aunty coz she was worried what she would say. I wonder how wet-nurses could do it, and how ppl could give their babies to others to feed. I think it would weird me out too. But I think donated milk is ok.