sub_divided

Male nursery web spiders often woo potential lady-friends with gifts wrapped in silk. Mating may ensue, during which a female unspools the present, expecting to find a tasty treat. But the males can be unscrupulous. Some offerings contain inedible plant seeds or empty insect exoskeletons.

…The empty-handed males were mostly unsuccessful at mating. Whereas those with a gift could get the girl. But if the gift was worthless, the females quickly realized the deceit and pushed the copulating males off.

Linked to Marginal Revolution because it’s the best short summary, but posts about sex  on that blog bring all the anti-women commentators to the yard  -_-.