I just spent 3 days at the Back to the 50's car show in Minnesota. 12,000+ pre 1964 hotrods and about 100,000 spectators each day. Shaved heads were everywhere. Seemed about 1 of every 4 men of all ages was sly. That's just the guys without hats on. I think I liked it better when a shaved head was somewhat unique and edgy. Seems to be a long term trend.