Although in Portugal the speed limit is 120km/h (75miles/hour), it is normal to drive over 85 in Highways (and we do not have rules like Autobahn).
Many times we drive over the 85m/h just to get earlier to the destination and because everyone does that. It is more common to see male drivers alone in the car driving fast than others.
I already did it, specially when I was younger and you feel you can do anything. Other reason was reaching the destination faster and I was going at a normal speed (85-90), since all other cars were also at that speed.