In Rhesus monkeys the optimal sexual strategy is different for Alpha males, other males and females. Alpha males want females to mate exclusively with them, whereas other males and females benefit from promiscuity.
Like rats and mice, fruit flies avoid open spaces and stay close to physical borders. In rats and mice this is caused by fear to be out in the open and preference for close contact with borders.
Bed bugs are on the rebound in developed countries. Traditionally, bed bugs are controlled with pesticides. However, traps with attractive human body odors are a promising alternative.