To see how the limits of the collar. Though it makes one obedient, there are different ways to comply. For example, one could do the literal request rather than the spirit of the request, or the bare minimum of what constitutes as something. Brushed lips for example could constitute a "kiss".

Understanding how useful an item like that would probably be a priority for the first night. Though, I did take it away so she didn't have it after that point.