If this is an honest question:
You want female cannabis plants, because they produce the buds you want to harvest.
If you have a male plant in there, it will spray it’s pollen all over the place and the girls will invest their energy in generating the resulting seeds - and not into nice buds with much cannabinoids.

That’s why sensimilia is a term used for good weed - as it literally means, without seeds
Which also suck to smoke…

You force the female plant to produce pollen and use the pollen to create seeds. Since no males are involved, your seeds lack the genetic information to produce males.