REQUEST: a pic and background

[lf36201]

I'm sure many of you have seen the picture of three young ladies, hands tied behind them, sitting nude on the floor in front of a sofa. The distinguishing feature of this is the sack over their heads. If you have the picture I would appreciate your posting it. Any more in the series or similar would be great. And lastly what is the story - why do they have a sack over their head.

Thank you.