I was right about the pumpkins

I googled it and indeed pumpkins produce male and female flowers on the same vines. According to my sources, the male flowers start about two weeks before the female flowers, so it's normal that I'm not getting any females so far. They should start in about six days now. And inadequate pollination is indeed a cause of poor fruit production. So I don't need to pollinate anything now, just wait until next week for the females to show up.

I learn something new every day.