GVG-940 - Deepthroat Training: The Student Teacher's Breaking Point

Why did they put panties on her? The last two entries were fully nude, and the fellatio combined with cunnilingus was peak. Since I personally think this is the highlight of the series, I wish they'd given the inverted suspension scene more screen time. They should've gone all out with hands tied behind the back, legs spread wider, hugging her while she's performing, or licking her pussy right in front of her face without using hands.