It's often quite difficult to deal with encroachment. A naive fellow will just turn away and move farther toward the edge of the bed to create additional breathing space, but experienced men know that she will inevitably rapidly swallow this extra space up as well, so that she can move closer to her goal, the oft-achieved "diagonal" sleeping pattern, leaving the poor man clinging to the edge of the bed with no separation at all!
A wise man, who has mastered the ways of women, knows that the space between his body and the edge of the bed is sacred, and must be defended at all costs. Only by establishing a rugged guard may he achieve an unyielding defense against the female encroacher. The successful technique is rather counter-intuitive. Rather than turning away from the foe, the man must roll TOWARDs her, and make himself as bony as possible. Elbows and knees must become as little knives that are directed squarely at the encroaching female's sensitive kidneys, ribs, and neck areas. Give no quarter! As the female attempts her inevitable attempt to capture more space, she will have no ability to penetrate this well-constructed wall of bone. Her attempts to encroach will be frustrated as they only cause her sensitive areas discomfort, and with no space gained as a reward! At last, exhausted, she must collapse in defeat, and be forced to sleep on her own fucking side of the bed.