A/N: This story came into my head while I was watching Across the Second Dimension. Tell me if you think it should be rated differently. I do not own Phineas and Ferb, if only I did. Enjoy!
After a fantastic, fun filled day, the Phineas and Ferb gang were about to have their minds erased so that they couldn't remember Perry's secret identity.
"Uh, Major Monogram?" asked Isabella. "Uh, yes?" replied Major Monogram. "So none of us will remember any of today?" asked Isabella. "That's right." replied Monogram. "Good." Isabella said, and she suddenly turned round, grabbed Phineas, and pulled him into a kiss. Phineas was surprised at first, but he found he rather enjoyed it. He also tried to ignore the tightening in his pants. "Isabella!" said Phineas, happily. "Hit it!" said Isabella. "Wait, wait, wait!" shouted Phineas. Carl pressed the button, and the gang's minds were erased so that they couldn't remember any of the day's events.
Phineas' first thoughts were, "What happened today?" and then he felt a tightening around his groin. He didn't need to look down to find out he had an erection. He looked down anyway, and saw the very visible bulge protruding from his shorts. He wondered what could have happened to get him that aroused. He had only got this aroused when he had had erotic dreams about Isabella, but surely he couldn't have said anything to her or kissed her, could he? He was too embarrassed to do that. He kept thinking how he could have got that aroused without Isabella's help.
Isabella stood there completely frozen. "What happened today?" she thought. And then, she realised that she was wet around her vaginal area. She wondered how she could be wet. She only became wet when she thought erotic thoughts about Phineas, and as far as she could recall, she hadn't had any today. But then, she remembered a part of the day. She remembered asking Major Monogram about remembering anything that happened throughout the day, he said no, and she then remembered kissing Phineas. She remembered slightly feeling Phineas' erection push against her vagina as she kissed him, but that's all she could remember. She turned to look at Phineas, who was talking to Candace and Ferb, probably about not remembering today as well. She blushed, and walked over to Phineas. "Hey Phineas, whatcha doin'?" she asked in her sweetest voice. Phineas turned around to her and smiled. "Oh, hi, Isabella, me, Ferb and Candace were just talking to see if any of us could remember any of today, but we couldn't remember any, can you remember any of today?" asked Phineas, rambling a bit. "Well, actually, yes, I can." replied Isabella. "You can. What?" asked Phineas quickly. "Well, I can remember this." said Isabella, and she pulled Phineas into another kiss. Phineas' erection had just started to go down, but it soon came back up again. They shared a kiss for about a minute, and then everyone wolf whistled and cheered. Isabella pulled away, and she and Phineas blushed as red as a tomato. They both just shrugged, and kissed again, while everyone cheered.
A/N: Did you enjoy it? Did you not enjoy it? Please review, it'll make my day.