See these bollards? http://www.road-care.co.uk/images/bollard1.jpg http://www.road-care.co.uk/images/bollard1.jpg They're all over Amsterdam. Strong selection

See these bollards? http://www.road-care.co.uk/images/bollard1.jpg http://www.road-care.co.uk/images/bollard1.jpg They're all over Amsterdam. Strong selection pressure establishing a minimum height for men wanting to father children there.