For a Sagittarius independence is a fundamental factor in a relationship. Since it can bind himself deeply for friendships or love, just can't stand to be denied of its freedom. For a submissive sagittarius no torture is worse of the physical and psychological constriction, the feeling of being possessed without escape. And if instead it is sadistic, it's well known the sagittarius likes to travel... in company.

Legs and thighs in particular are their more sensitive areas. Thiny floggers and crops perhaps are adequate for those body parts.