I've been a DL for quite some time, and it used to really be an important part of my sexual identity, but lately it hasn't been such a big thing for me. I still like them, but now it's only an occasional thing, not the defining feature.
I've never been into the whole binge-purge cycle that some people do so I'm sure it's not that. I think it is just that I am becoming more balanced in my sexuality by enjoying several different aspects of it besides diapers.
Any thoughts on the matter?