The birds and the bees
Definition 1 of 1
Pro Tip 1/3Age Appropriate
Used when discussing reproduction with young people in an indirect way. 
Her mother thought she was old enough to hear about the birds and the bees.
Pro Tip 2/3Sensitive Topic
It's a delicate subject that needs to be approached with care. 
He stumbled as he tried to explain the birds and the bees.
Pro Tip 3/3Parent-Child Talk
Often used when parents explain reproduction to their children. 
Dad said it's time we had a talk about the birds and the bees.