Unfortunately, my usual sources have come up mostly dry as well, although one suggested that "birds and bees" are used to explain sexual reproduction because you're explaining non-mammalian reproduction and floral pollination.
(birds and bees; to explain; sexual reproduction; because you're explaining non-mammalian reproduction and floral pollination) (you; 're explaining; non-mammalian reproduction and floral pollination) (one; suggested; that "birds and bees" are used to explain sexual reproduction) Context(one suggested,List([74, 87))):(birds and bees; are used; to explain sexual reproduction because you're explaining non-mammalian reproduction and floral pollination)
one suggested,List([74, 87))
birds and bees you one birds and bees
to explain 're explaining suggested are used
sexual reproduction because you're explaining non-mammalian reproduction and floral pollination
non-mammalian reproduction and floral pollination
that "birds and bees" are used to explain sexual reproduction
to explain sexual reproduction because you're explaining non-mammalian reproduction and floral pollination