User blog comment:PlantyThePottedPlant/Random Topic Blogging III: Blog Harder/@comment-1659929-20140507180736

headcanon: Phineas is younger than Isabella by a few months, almost a year.

This would give some small explanation to why Phineas is blind to Isabella’s love for him.

Usually, girls tend to start liking boys at a younger age, than the other way around, so not only would he be “slower” at liking the opposite sex, but he would also be younger.

Also would explain the height differences (even though girls tend to be taller than guys during the ages of 10-13 due to puberty starting earlier for girls), Phineas has been seen tone shorter than Isabella (or maybe it’s a animation error?).

Any thoughts?