Here's why:
* Sperm is the male reproductive cell, and it doesn't flower. Flowers are the reproductive structures of flowering plants.
* Flowering plants are called angiosperms. They are a diverse group of plants that produce flowers and fruits.
It's possible the term "flowering sperms" is used in a metaphorical way, but without more context, it's difficult to understand its intended meaning.
If you can provide more information about where you encountered this term, I might be able to give a more accurate explanation.
