That's odd?

For weeks now a male Bullfinch has been a regular at the Sunflower seed feeder, in contrast to previous years when a pair showed up.Today after the male had visited 2 females arrived and stayed for sometime, although annoyingly one chose to remain on the back of the feeder.The end of he tail feathers is just about visible sticking out beyond the bottom port on the left hand side - honest! I hope there will not be unseemly goings on with a ménage à trois?