The Clothes Grab You

A subset of clothes changing stories involve the clothes physically grabbing the person they wish to change. Inanimate clothing becomes animated.

Most of the time this is a physical manifestation of a spell. Where a witch points their wand at a person and then clothing flies at them.

Typically as the clothing forces itself upon the person, their limbs and desires transform. For example a bra might clasp itself around a man’s chest only for breasts to start filling the cups. Or stockings might tighten the man’s leg muscles until they are slender and feminine.

Typically when this happens various clothing items are used to gag the victim so they do not scream.

This sometimes go hand in hand with cross dressing if there is no physical transformation.