Scott Disick insists there is no "real advice" to hand out about parenting.
The 'Keeping Up With the Kardashians' star - who has kids Mason, six, Penelope, four, and Reign, 22 months, with ex-girlfriend Kourtney Kardashian - thinks his former lover's brother Rob Kardashian will be a great dad when his fiancee Blac Chyna gives birth to their baby next month, but he won't be giving him any tips on raising his family as there isn't a "rule book" on raising kids.
He said of Rob: "I think he's going to be a great dad. You learn as you go. There's no real advice you can give anybody, and if anybody says there is, they're lying."
Asked the best advice he was given when Mason was born, he added to People magazine: "None. I could have used some advice probably. It's not easy. Kids don't come with a rule book. You gotta figure it out yourself. It's one of those things."
One way in which being a father has changed Scott's outlook on life is that he has more fun on spooky celebration Halloween now.
He said: "The kids really like it, so it makes me want to get into the spirit of it. Before that, I was not a monster Halloween guy, per se, but it's fun now."
While Scott, 33, split from Kourtney, 37, over a year ago, he is still a part of her family's reality TV show and admits having his life shadowed by a camera crew no longer feels strange as he has been doing it for so long, it is just "second nature".
He said: "I think reality TV is just a part of our life and it follows our lives.
"I'm not steering in or out of it. It's just kind of second nature at this point. You've got to remember everyone in production we've been with for 10 years so it's basically a big family."