طَوَّافُونَ عَلَيْكُمْ بَعْضُكُمْ عَلَىٰ بَعْضٍ
You regularly move about and visit one another.
Repeated access can make strict separation and avoidance difficult. This creates a relevant consideration of recurrent contact and practical need in certain rulings of ease.
The same rationale helps explain the treatment of cats that regularly enter houses. Yet it does not follow that every animal entering a house has identical legal rules in all respects. The extent of the rationale and contrary evidence must be considered.