Picnic blanket

A combination of spooge and period blood whilst banging a girl on the rag

Andrew gave his girlfriend Julia a picnic blanket yesterday at the party…No ants were reported injured..

waterproof picnic blanket

An obvious euphemism for an outdoor, wet-weather orgy.

Janet and Bill have invited us to a waterproof picnic blanket on Saturday. I said we'd go if we've got nothing on.