I'm a 54 year old straight male DL, I've had a fascination with diapers since I was 4 or 5 years old. I thought something was horribly wrong with me. It wasn't until I got my first computer and a dialup modem and a Compuserv account that I discovered I wasn't the only one in the world with an urge to wear diapers and wet and poop them. And that was before Depends even made a diaper! (Tossed a lot of old T-shirts!)
Needless to say it has caused some interesting relationship issues. A long time ago I decided it would be dishonest and unfair not to let a lover know about my quirk before things got real serious, to give her a chance to back out if it freaked her out. None of them ever did, but not all of them were very excited about it, either. You can't make someone like something if they aren't inclined to like it. I'm in a relationship now that I am very happy in, my girlfriend knows but does not participate.
I look forward to joining in some of the conversations here and giving advice and tips based on my experience wherever it might help.