@Fernie The question would be, "Is it normal." It's not very normal for women to date below their own age. They tend to choose older men. Whereas, men don't typically care much, though prefer younger.

And 20 and 25 are not almost the same age. Maybe from an older point of view, but there is tons of brain development in this period. The second biggest change after puberty. 20 is virtually a teenager, still.

And anyway, that rule is only for what society generally sees at acceptable and won't freak out.

@Tatsumi since you are in your early twenties...you really have no clue what is a "normal" dating age. The difference between most 20 and 25 year olds is insignificant

@Fernie I'm 27. That's mid-to-late 20s. Definitely not early. It's also irrational to equate age with knowledge, since they are mutually exclusive. One gains more experience as they age [which can be worthless, depending on the experiences], but not necessarily knowledge or correct knowledge.

And, it's not really debatable whether or not there is a difference between 20 and 25. Frontal lobe development increases a lot in that span, and maxes out 25-27.

And, again, I didn't even state my opinion. Simply what the general rule is for social acceptance and "normality".