What is the significant of using the birds and the bees in the talk of the birds and the bees.?

bees pollinate using a proboscis [elongated appendage] thus analogous to the male, birds lay eggs...women carry eggs.What is the significant of using the birds and the bees in the talk of the birds and the bees.?
no clue, its outdated and therefore makes no sense anymoreWhat is the significant of using the birds and the bees in the talk of the birds and the bees.?
It was easier to talk around the subject back then. Remember we were not to use those things until we got married.....