Male = relief zipper
Female = zipper with an FUD or the drop seat. When I had a dry suit I preferred the drop seat. I was on a raft so the big butt zipper didn't bother me. Some female kayakers say the zipper is uncomfortable in a kayak?
"We are all visitors to this time, this place. We are just passing through. Our purpose here is to observe, to learn, to grow, to love....and then we return home."
Australian Aboriginal Proverb