This is how it is decribed:

".. what looked like a collar with two very long straps appended from it. 'Your legs go through the straps so that they are positioned just inside your thigs.'"

So it's like putting on trousers? Like to strap rings you step into?

"'You are to wear the collar and thongs at all times.' (..) then slowly slipped her legs through the straps , and then stood up, pulling them tightly against her inner tighs, which made her mount more prominent."

"(..) The sights of those leather straps defining her feminine bush and pushing out her high, pointed breasts."

"'Put the collar around your neck.' It was a wide, supple leather collar decorated with golden studs and a hook closure."

"(..) It was perfect, the thin leather straps taut against her pale skin, conspiciously outlining her sex and her breasts, and culminating in the symbol of his owning her: the thrall collar."

How does did work, looks like (I must be very blond for not understanding this!) I mean she steps into these straps like you put on trousers, right? I understand how it will put the focus on your sex, but how can it outline your breasts? How is the "trouser" connected with the collar?