Board Thread:Fan-made Monsters/@comment-27950421-20170120224218/@comment-27950421-20170121192912

Basically it's more for in competition with other Pecos. Healthier and stronger Pecos have a brighter and more vibrant color. When two Pecos come into conflict (usually over a guy), they usually resolve said conflict in competition of dancing and singing. Those who can dance the best and most energetically, sing the best, and can inflate their breasts the largest and flush them into the brightest color usually coming out the victor.

They're kind of like tropical birds competing for a mate.