Hair
For both men and women, hair got longer and more finger friendly (meaning it could actually move because it was free of sticky/greasy styling products more often) during the 60s. While some gals opted for pixie cuts (a la Mia Farrow and Twiggy), a mod bob designed by Vidal Sassoon, hairspray coated bouffants and beehives or afros (all of which looked marvelous), the classic look that immediately comes to mind when I think of the 60s decade is hair that falls to or past the shoulders with heavy, eye framing bangs. I could be wrong, but I tend to think that most men still prefer long hair on women, and the 60s certainly provided them with plenty of that.
Sexy, Not Slutty"
I've seen this comment left plenty of times on YouTube by guys when reminiscing about sexy starlets and singers of the 60s. Sure, this decade gave us the miniskirt, hot pants, and bikini, but most gals knew the meaning of modesty--if they were going to show off their legs in a short skirt, they usually revealed little else. Today, it's all about showing too much skin and leaving very little to the imagination. Sixties women knew how dress sexy and look classy, not trashy.