If you let the pollen stay on the plant late into the flowering period what @Foreigner is getting at is that the plant will continue to produce new seeds but these seeds will NOT develop in time to create viable seeds.
If you pull the males out at week 5 of flower, then soak the female plant down to deactivate the pollen resting on the bud sites the plant can then use the remaining weeks to pump all that work and energy into growing big viable seeds.
