I've only ever told my wife, very early on in our relationship. I think that is 100% essential to do. She works in healthcare and deals with medical uses of diapers regularly so we worked hard on both of us learning what it really means to me, and that it'll never go away and is actually an incredible stress reliever for me. She knows without a doubt that I don't associate it with any sort of medical needShe finds ways to work diapers into our kinky bedtime play and wears during "situations" but takes them off as soon as we're done, where I like to keep them on whenever we're alone and relaxed. To her they're just another sex toy but she's fine with me having my own relationship with them. I've considering telling my best friend who is very open minded and alt lifestyle adjacent. We're just 2 manly men doing manly men things so it's never come up though he has expressed his openness to "being weird and doing whatever the hell makes you feel good". He's friends with a lot of alternative lifestyle folks and I respect him greatly for that. We got on the topic of Furries the other night and I said I've never met one in real life and he said "Yeah, you know me...", so when the time comes for me to tell him I'll do it proudly and with zero hesitation, In 30 years of friendship it just hasn't come up. I am really excited nd wanting to reach out and meet other ABDL's because I know with certainty that most are amazingly cool people and sharing this side of ourselves is like an open door for healthy conversation and friendship, I just gotta get over that hill and it'll be smooth sailing from there.