New research shows watermelons can have a Viagra-like effect. But there is a catch.

Just a week after the annual Watermelon Thump celebration in Luling, Texas, there's something new that watermelon growers can hang their hat on.

The director of Texas A&M’s Fruit and Vegetable Improvement Center has discovered that watermelons have an ingredient that delivers Viagra-like effects and may even increase libido.

“Give me two more!” laughed Hoyt Alford.

There is a catch: The phyto-nutrient called citrulline that relaxes the blood vessels is found in highest concentrations in the part you generally don't eat — the watermelon rind.

"Would it take like a whole watermelon rind to eat to do any good?” wondered one Luling man. “You might get yourself sick before you do yourself any good!”

“[I’ve never eaten the rind], but I’m going to start!” laughed another man.

Rinds are used in watermelon pickles — they're Kelly Allen's specialty.

"My husband loves these,” she said. “I don't know if it’s because he eats these or not but he doesn't have a problem!”

Neither does Hoyt Alford ... according to his girlfriend Lois.

"I don't know that you need ‘em!” she laughed. “Well thank you!” he replied. “That's a compliment, isn't it?"

Scientists are working to breed watermelons with higher concentrations of citrulline in the flesh which may change Luling's image from being known for watermelons … to something else.

The researcher who conducted the study says the watermelon rind also has a beneficial effect on the heart.