Age is just that...a title of numerical value.
I'm halfway through my years now, and still am younger at heart than many who are just beginning in their adulthood.

Everyone attends to maturing in their own ways. Our approach are as unique as the individual themselves.

My step daughter was far ahead in her years....matured much too quickly, imo, and wouldn't allow herself a "break". She didn't share the interests as other girls her age, therefore pretty much iscolated herself from much of what her age group had fun in. Ended up gettin married just out of highschool and began her own family. Even though she's seemingly content, I still attempted to encourage her to wait on starting her own family and to enjoy her young adulthood with her hubby. To each their own.
Now, almost 10 years (and 2 children) later, she suffers from serious anger issues and high blood pressure, although I doubt that is a result of the children..(something she's carried long before that).

My dad, just turned 80. Still as youthful in spirit and playful in actions as any young adult is....(traits I've been blessed with and wouldn't trade for the world). He takes life in stride, doesn't sweat the small stuff, and finds humor in many aspects. Still remains active and limber, yet has managed, (with the partnership of my mom, of course), to raise a small army of 10 kids, and has involved himself in most of our childhood activities.

I'm the same way with my daugher, now 13. I have no problem with including myself with her playfulness, however, I've found that I tend to be more playful than she is in many ways. That doesn't make me immature..just young at heart, (though, that opinion depends on the individual). I've been called immature...just due to my young spirited behaviors....So be it...

This brings me to the combinations of age in realationships. I seriously believe that age has little to nothing to do with the unitement of two individuals..so long as both are of consenting age and it is of a mutual goal, regardless of who is the older/younger, (the gender shouldn't have any influence, whatsoever), or of the age variance.
One of my brothers married a woman 20 years younger than himself and is happily married. While that is accepted by our society, (older men marrying far younger women), the opposite is not accepted, (older women marrying far younger men), which is absolutely absurd.
(I must include the fact that I am involved in a relationship with a man who is 20 years younger....and I cannot be happier than I've ever been....despite of all the issues we've had to contend with to date, and will continue to have thrown at us throughout....It's no one's business, but our own).

I feel it is due to our society that applies far too many limitations on what is "accepted" and what is not. Regardless, (and being the "non-conformist" that I am), I have always gone with what suits my spirit and pay little to no attention to what we are "supposed to" BE accepted by society.

One must march to the beat of his/her own drum, and defy that of which is placed upon them merely because their behavior doen't "fit in" with that is "allowed" by others.

So long as YOU are happy and that you are living for YOURself, to hell what everyone else has to say. Simple as that.

Sorry for the partial rant. This sorta strikes me a nerve...LOL.

Shangrala