An AA flight I was on a couple weeks ago some rather large woman (north of 200) had mentioned she never had a problem in first class with getting her belt buckled, but in row 8 of an MD80 she needed a seatbelt extender.
I was certainly glad I wasnt sitting next to her....
Panjabi - for many men over 6' tall (and there are alot of us) 160 would be pretty skrawny.