Yes, this really is my website. Yes, that really is my email address. I own the domain name and I own EVERY email address at this domain.
I do this because I know if my contact information is getting sold or used elsewhere. If I don't know what they are doing, I block that email address.
I can sort my email quite easily. The downside is I get more spam than you can imagine. The computer sorts it out pretty good. If I like you, I'll give you a better email address. :)
It's a great idea, but it's not for everyone. If you do this, pick a better domain name than young computer geek would pick. You'll get a lot less questions.