"Who said I wasn't interested in sex?" Donnie murmured, his cheeks slightly turning pink.

His voice wasn't louder than a whisper, but the two eldest turtle didn't miss these words and immediately stopped their arguments to look at their smart brother with astonished eyes.

"I beg your pardon?" Leo said, his blue eyes opened wide.

"What?" Raph said at the same time.

"I... I mean," Donnie suttered, embarassed that all the attention was suddenly focused on him, "just because I never talk about it doesn't mean that I don't enjoy it... Or think about it... I... I have needs just like you, guys..."

"Oh godness," Leo almost shouted, "you can't possibly think about sex, you are too... You're too young!"

"Yeah," Raph added, shouting too, "you're still so innocent!"

"Guys... We are the same age, you know that, right?" Donnie shyly murmured, but his two brothers weren't listening to him anymore. He shifted nervously on his chair, blushing hard. 

"My precious little brother, you don't know what you're talking about, you don't know anything about sex and that is really good that way."

"Yeah," Raph added, "you don't need to know what is sex yet!"

Right at this moment, Donnie loudly sighed. If they only knew what he was doing with Mikey every night, they would be traumatized.