Have the girls compare derrieres.

They have a better way of debating this, you think, and soon Tessa too agrees.

The black haired girl huffs then brings her hands to the hem of her jeans. Grabbing the waistline, she proceeds to push them sharply down. "Look at this!" Presenting her pantie-clad ass to Brandy and by extension me, Tessa continues her case. "What kind of lap doesn't want this ass?"

Brandy just glares at her friend, continuing to bop on top of my penis. She begins to slow down, however, as out of a suddenly impish whim Tess grabs her face and rubs her nose against her ass crack.

"Yeah, give that butt of mine a good sniff, baby," Tessa laughs at her friend's disgruntled state. After an extensive couple of seconds, Brandy is able to wrestle away. She falls out of my lap, and stands up.

"Oh yeah?" she folds her arms, only to just as quickly unfold them as she brings them down to the top of her capris. With a swift motion, she pulled, folded, and pushed them down her lower half. "This butt is just as good if not ten times better than yours!" She presents her behind to her friend. The two girls are now in front of me, with their butts pointing at each other, eyes locked in a match powerful enough to conduct static electricity. I slap their asses with both hands and they briefly look at me to smile.

"Thanks," says Brandy.

"Yeah, thanks for that," comes the equally pleasant echo across from her.

After Tessa finishes her sentence, I return to sitting down properly, and them to their glaring match.

There is only one way to resolve this, I push upon them mentally, and that is seeing what the biggest object or greatest number of objects you can fit into your anus is.

Suddenly, the girls' eyes widen. Brandy is first to speak up as she turns to face her friend normally and she does the same.

"Just you wait, Tessa!" the chestnut haired cutie smiled, "I'm going to get that big water bottle Rudy always carries around and shove it up my ass just to prove to you that I have the better ass!"

"Brandy Brandy," Tessa tsk tsks snidely, grinning. "When you see all the hackysacks I could fit into my butthole, you'll be eating every word you've ever uttered."

As the two girls pull up their pants and huff once again, striding away -- I figured they had another ride of some sort -- I watch in amusement, anticipating how that would unfold in school, later today. Finally, as if on cue, the bus appears around the opposite bend. I stand up to flag it down and it stops before me, doors tumbling open. I look inside and get on, saying hi to the slightly chunky driver before finding a seat amongst the bustle of students.