I told my GF upfront long before things got serious. I decided when I was looking for a GF that they would know upfront. That way I would know they accept me for me. I do also mention that I don't expect them to have anything to do with them(changes, discarding the dirty ones) nothing at all. Most are ok with it that information. Fortunately my current gf thinks it's sexy when I Wear sometimes we even have sex while I have one on.