Life outside the Playboy Mansion is full of new adventures for former Girls Next Door star Kendra Wilkinson. The 23-year-old, who joined Hugh Hefner’s harem of hunnies when she was just 18, revealed to Celebuzz that there are a few things that have taken some getting used to as she embarks on her new life–like stamps and the complex process of using the United States Postal Service.

“The first time I mailed something on my own, like a couple of months ago, I didn’t put a stamp on it! My mom, she was like, ‘Are you serious? You didn’t put a stamp on your fucking mail?’ I’m like, ‘Dude, I’ve never been on my own before, how am I supposed to know?’”

Hmmm….I didn’t know you had to use a stamp either…and then 1988 rolled around and I turned 4!! She’s not pretty enough to be this dumb!

Kendra is set to wed NFL star Hank Baskett at the Playboy Mansion in June. Watch out for the newlyweds’ E! reality series, Kendra, premiering next fall.