When the first male flowers are almost ready there will usually be pods of varying stages of development. Some about to pop and some half way there and some just forming. I'm guessing mother nature intended this, so if the male is getting frisky there's a better chance at least some of his pollen will land on a ready willing and able female.
When the first ones are almost ready, they will be swollen. When they open up, you'll see a fine yellow dust, often dropped on the leaves around the male flower.
Turn all fans off, etc. Place a tray, cup or sheet of paper under the spewing flower and give the branch a little nudge. Most males will be happy to give up some pollen. Sometimes it's easier to clip a branch that has several ripe male flowers and gather pollen from that. The slightest air movement
will disperse your pollen, so be careful to gather pollen away from your female plants.
A Q-tip makes a good pollen applicator. Gently touch the Q-tip to your pollen and you'll see the yellow on the cotton. If you rub that on a hot to trot female plant's pistils, expect seeds in about a month, even longer is better to let the seeds fully form.