Taylor Swift was a grown adult woman, 24-years old, when those pics were taken. There's nothing wrong with admiring the beauty of adult women.
While it may be legal for a 30-year old man to date a 14-year old girl after receiving her parents' permission, it is, in 2017 America, at the very least frowned upon as inappropriate. If this is something that Moore used to do, he should've understood that it will handicap his race for senate. He should not have ran.
Now, if these accusations are wholly without merit and Moore never dated underage girls, then he needs to fight back aggressively showing no quarter.
Especially if they have any.