He explained while you acted like making out

Once more Frank threw himself at you and whispered into your ear. "Act as if I would be going down on you. I don't know if they have cameras or microphones installed in the toilets." Still not understanding you looked at him. He lightly sighted giving up that you would pick up what he wanted right away. "Like Chaz said, it is bad of you to peek on others having sex. But you are lucky that I'm still not satisfied." He put his hands on his shirt and took it off. You were surprised as you saw what Frank wore under it. He wore a dark-blue bra with a lot of lace. It was quite sexy, but totally out of place, especially as the small cups were totally empty on his male chest. "Do you like my new, sexy underwear?" He asked sounding a little aroused. "I also wear something even sexier down here." He opened his pants and pulled them down, revealing a matching dark-blue lacy thong. Frank ran his hand on his thigh, and let out a light moan. "Oh, yeah, I knew you couldn't keep your hands off." He leaned once more against you and whispered into your ear. "They brainwashed me into loving to wear such sexy underwear." He moved a little away again. You looked over his sexy-female underwear wearing body, and somehow remembered a picture of a crossdressing boy wearing some similar underwear, though the boy was Asian and had a smaller bulge on his thong than Frank had. Despite remembering the picture you didn't remembered why you had seen it. You wasn't in crossdressing and such things.

"Now it's my turn." Frank pointed towards your groin and that you should unzip it. You hesitated still not fully understanding what he wanted. Frank lightly sighted again. He took your shoulders and turned you around, followed by him pulling your zipper down. "Oh my god! Are you still hard from seeing me having sex with Chazlyn? Or did I make you so hard?" "Act as if I would give you a blowjob and I'll explain you in the meantime." Frank made some licking-sounds, which could easily be misunderstood as him licking your penis. "Come on, or we will be busted." He whispered into your ear.

Now you understood what he wanted. You faked a light moan, but as Frank responded with a louder licking-sound you faked louder moans.

"I'm sorry for all this, but that was the only way I could come up to tell you what was going on." Frank whispered while you drowned out it with your faked moans.

"Why are we this and not openly talk in our rooms?" You asked also whispering while Frank made loud licking- and sucking-sounds.

"After you and the others were gone after Dr. Summer's ... treatment ... I acted on my own, which may have made me the center of her and the headmistresses attention." You were shocked to hear that Frank had acted on his own. Just what the hell did he do, that would result in such a scene like you were into?