Wonder why? Guess gay men are not immune to the sexualization of women's bodies. Women's bodies have been used as sexual objects for so long, that when a mother breastfeeds - actually uses her breasts for what they are for - people get embarrassed because they believe she is exposing something that should only be seen in intimate sexual moments.
I think I explained why. It just strikes me that nursing is a very private and intimate thing between a mother and her child, and nobody else's business. This has nothing to do with sex.
You've reminded me of a time I was in California, and went to a botanical garden with some brokies....it was a peaceful place. While we were walking, we came upon a lovely batch of flowers, and sitting on a nearby bench was a mother nursing her child, we stopped in our tracks, and she looked angry that we dared to be walking in the garden at that moment.
At that point, one of the Brokies leaned to me and said: "Well, she picked the right place to do this." and then nodded to the flowers in front of us, and the mother.
The sign there indentifying the flowers read: "Succulents".