Abstract: The present technology pertains to supporting contact interactions between avatars. For example, the present technology supports collisions between a collider and a receiver on avatars and effectuating a resulting effect. In another example, the present technology supports contact interactions that result in secondary motion behaviors from portions of an avatar. Portions of an avatar can be manipulated by forces from colliders that are exerted on the portions of the avatar configured with secondary motion. In addition to supporting interactions between avatars and portions of avatars, the present technology also solves other problems that are collateral to the supporting of contact interactions between avatars. One such problem is one of consent to engage in contact between avatars.