Restraint challenging in private with no overt sexual implications will be stored here. This may be cross-referred with the 'bondage' oriented storage area if both parties admit to being turned-on by the situation.
The psychological appeal of escaping and/or not escaping, of watching, of planning or experimenting, are aspects already discussed in material I have written in correspondence and "fiction based on fact".
As the 'topics' list is expanded, distinctions will become clearer.
Links to source sites and individuals pictured below are being prepared.
These thumbnails expand but better resolution copies are being sought