Quote: "The fact that I wear glasses usually means that supra-aural headphones push so much on my ears that they eventually start aching because of all the pressure between the cushions and my glasses. Normally I can’t wear supra-aural headphones for more than 20 to 30 minutes, which is why I stick with circum-aural (over-the-ear) headphones, but the Sennheiser HD 239 are different."