The Adulterous Pants of Doom

Were thrown over my front wall a couple of days ago, under what circumstances does one lose a perfectly good pair of pants?

Were they thrown from a passing motor vehicle?
Were they dropped by a fleeing (yet uncoordinated) Don Juan?
Were they torn off and forgotten in a moment of tumultuous passion?
Are they in fact Transdimensional Trousers of Time?

Aaaand book shopping

Forests of the Heart by Charles De Lint and Sea Dragon Heir + Crown of Silence by Storm Constantine.

Curious, all by the same publisher as well, secondhand book stores have strange gravitational attractive forces.