Yet it's ok for them... we got married last May... It's ok for her dress to have hung on the spare room door for 8 months, she's finally decided to get it cleaned and boxed up...
Keep filling the house with car parts, it gives them less room for their crap!!!

Parents on the other hand arn't to bothered...
Going back around 8 years ago ( when I was still living at home )... My parents understood that I'd thrown nearly £10k at my Scooby engine rebuild, the last thing you'd wanna do is build it up outside...