Watermelon and all fruits are not male or female. Fruits contain the seeds and seeds develop from eggs. Females have eggs while males have the smaller gamete called pollen for trees and sperm for animals.
Plants are different than animals. A plant is neither make or female. In some species have male and female on the same plant while others in the same structure like the same flower. (I'm not an expert but even I know this)
The difference they state is only the size of the fruit. The picking tip I guess should be get the more round smaller melon.
How to pick a perfect watermelon: tips from an experienced farmer

Who doesn’t love watermelon? Most people are obsessed with this delicious and refreshing fruit. Sometimes we think that unless you’re an experienced farmer, buying a juicy, tasty, fully ripe, and sweet watermelon is hit or miss. However, it doesn’t have to be if you look for a few things when you’re picking out your melon. In fact, you can tell whether a watermelon is ripe without actually cutting it.
Today, we at Bright Side would like to share some tips from experienced farmers that will help you to choose the finest watermelon ever.
Look for the field spot
The yellow spot, known as the field spot, is the place where the watermelon rested on the ground. Ripe watermelons always have creamy yellow or even orange-yellow spots, not white.
Look for ’webbing’
These weblike brown spots on the watermelon mean that bees touched the pollinating parts of the flower many times. The more pollination, the sweeter the fruit is.
’Boy’ and ’girl’ watermelons

Many people do not know that farmers differentiate watermelons by gender. For example, ’boys’ are bigger, have an elongated shape, and a watery taste. The ’girls’ have a rounded shape and are very sweet.
Pay attention to the size

It is better to choose neither the largest nor the smallest watermelon. Select an average-sized fruit. And note, please: large or small, the watermelon should feel heavy for its size.
Inspect the tail

A dried tail indicates that the watermelon is ripe. However, if the tail is green, it probably means that the watermelon was picked too soon and will not be ripe.
Comments
Related Reads
$96,000 of Free Babysitting, and the Birthday Party Where a Grandmother Finally Asked for Gratitude

12 Family Members Who Got a Second Look, From a Mom Home After 20 Years in Prison to a Brother Behind a Gas Station Register

15 Acts of Kindness That Teach Us Compassion Still Brings Lonely Hearts Back to Happiness

15 Loved Ones Whose Kindness Lives On, From a Late Mom’s Nickname to Grandpa’s Fuchsia Mashed Potatoes

10 American Stories That Teach Us Kindness and Compassion Still Show Up From People Who Owe Us Nothing

12 Real Parenting Moments Where a Mother Cleaned Bathrooms, a Cousin’s Debt Paid Forward, and an Aging Parent’s Delayed Retirement Plan

18 Women Who Showed Support With Coffee, Kinder Eggs, Cooking Lessons, and Exactly the Right Silence

14 Times Compassion Found Lonely People First, From a Neighbor’s 8:10 Coffee to 48 Crayon Drawings

11 Stories Where Compassion Showed Up in Times of Loneliness: a Night Nurse’s Forgiveness, a Child’s 6:45 A.M. School Secret, and Mom’s Freezer Meals

12 Animal Shelter Moments That Prove the Smallest Acts of Kindness Can Create the Biggest Bonds

11 Teacher Stories That Remind Us Why Every Struggling Child Deserves Someone Who Notices

10 Gardening Moments That Prove Kindness Plants the Seed, Hope Waters the Soil and Happiness Blossoms

