HM here. Public servant and union member. And yes, I am aware of the typo in my blog name. http://www.harrangueman.blogspot.com/
As in fall right down, or just slip a little bit, like the opposite of a mild wedgie?
Fall down to upper thigh. It's cause I am a harry high I think.
Hmmm I have no idea how that could happen! But being a girl and probably wearing tighter pants than you I guess the mechanics of it would be totally different!
Well being a heavyset person makes a difference too cause once it sinks below gut line then it rapidly goes loose.