The following phrases have something very unusual in common that has nothing to do with their meanings. Can you spot it?

PATHETIC SOULS
MALE LION CUB
MADE IT THROUGH


Hints:
1. The same letter pattern is repeated in each of the phrases.
2. GAMBLER'S IOU could be added to the list.

Answer:

Each phrase contains the five vowels, A, E, I, O, U - in order and without any intervening vowels.