Voice now I don't wish to put anyone off their dinner, but in those days it wasn't really panty liners. Sizing and and design more like a hammock on the Titanic.
Jules, that comment just reminded me of an episode from my childhood which I thought I had expunged from memory.......
Please indulge me.........
I would have been around 7 or 8 years old (so '67 or '68...you do the maths
), we had a linen cupboard at the top of the stairs and the top shelf of cupboard was my secret hidey place where no-one would ever find me. I could just squeeze in and no more. My mother had not long come out of hospital, she had gone in for a full hysterectomy, had complications and a long convalescence in hospital had followed.
So, on this particular day, my dad had invited some family and friends round for a wee get together to say 'Welcome Home' for mum. Several cousins were there and we started to play hide and seek. Naturally, I took refuge in my secret place but whilst there, I came across a box which said 'Dr.Whites'. I had no idea what this was and showed it to my cousins, who were equally baffled...(all my age, pretty much..) We took out the contents and inspected these very large cotton pads with loops on the end. No-one had a clue as to their real function but the upshot was that 3 or 4 of us went marching into the living room pretending to be accordion players, each having a mahoosive sanitary towel looped on our wrists and subsequently being totally confused by the reaction of the tea-drinking adults. 
I got one of the biggest hidings of my life for my trouble......ahhh, the sixties...........