Interested in Cockroach Sex?

When a male cockroach wants to mate with a female cockroach very much, he will scoot his butt toward her, open his wings and offer her a homemade meal — sugars and fats squished out of his tergal gland. As the lovely lady nibbles, the male locks onto her with one penis while another penis delivers a sperm package.

If everything goes smoothly, a roach’s romp can last around 90 minutes. But increasingly, cockroach coitus is going really, weirdly wrong, and is contributing to roach populations in some places that are more difficult to vanquish with conventional pesticides.

Back in 1993, scientists working at North Carolina State University discovered a trait in the German cockroach, a species that inhabits every continent except Antarctica. Specifically, these new cockroaches seemed to have no affection for a form of sugar called glucose, which was strange because — as anyone who has ever battled against a cockroach infestation knows — cockroaches normally cannot get enough of the sweet stuff.

So, where did these new, health-conscious cockroaches come from?

It seems we created them by accident, after decades of trying to kill their ancestors with sweet powders and liquids laced with poison. The cockroaches that craved sweets ate the poison and died, while cockroaches less keen on glucose avoided the death traps and survived long enough to breed, thus passing that trait down to the next cockroach generation.

But, wait, there’s more! We’ve not only introduced physiological changes; behavioral changes have expanded the need for re-examining the sex lives of these critters.

Yale study ties fructose to obesity

Fructose, a sweetener found on many food labels, may contribute to weight gain and obesity because it has minimal effect on brain regions that control appetite, a study by Yale University researchers found.

The research, published…in the Journal of the American Medical Association, is the first to compare the human brain’s response to both fructose and glucose, two types of simple sugars used separately and together to sweeten food.

Researchers have long suspected that increased consumption of food flavored with fructose, a substance sweeter to the taste than glucose, may contribute to the U.S. obesity epidemic. The latest study used brain imaging to measure activity after the sweeteners were consumed. It found that only glucose had the ability to reduce blood flow in areas of the brain that regulate appetite, stopping people from wanting to eat more…

The brain requires glucose as a fuel, Robert Sherwin said. When there isn’t enough in the body, it turns on cells to try to get a person to eat more. Once glucose levels rise, the brain turns those cells off. The study found that fructose doesn’t have the ability to operate that off switch, he said.

Jonathan Purnell, a professor of medicine at Oregon Health & Science University in Portland who wrote an accompanying editorial in the journal with colleague Damien Fair, said based on these results people should avoid processed and refined foods and drinks that contain fructose as well as glucose and eat more natural foods to reverse the trend in weight gain.

“It’s not that we are what we eat but what we eat influences what we become,” Purnell said…

Lots of folks talking about the study. It confirms common knowledge among folks who do at least minimal study of nutrition. Still – it’s appropriate to have a legit peer-reviewed source.