This has happend me and my OH lol. We are 25 and 26. I nearly always get asked for ID when im out too. I have a very baby face and im small too. So maybe thats why but it can be so annoying sometimes. I remember a time I was out for a meal with a group of my family and one of the waiters thought I was a child. There where 3 kids there. One who was my own. The waiter asked where there 7 adults and 4 childern. Everyone said no 8 adults and 3 childern. He just looked at me to say yeah right! I was so embarrassed but annoyed at the time time! Lol.