My most “realistic” fantasy would involve being adopted by a woman a bit older than me (Probably late 30’s or early 40s) and be made her perfect baby/toddler. Ideally she’d be a brunette or redhead, with a frame that screams “mom bod”. She would have a firm authority, but still very gentle. Sickly patronizing and maternal. Not afraid to be somewhat loud and embarrassing about how she fawns over her big baby.
I’d have a large nursery with the works: Crib, Changing table stock piled with diapers, mini tv with a bunch of kids cartoons/movies from the 90s and 2000’s, and a toy chest filled with a bunch of stuffies and action figures, bouncers, highchair, you name it. Tons of bright colors, and an array of babyish characters surrounding me like Barney, Winnie the Pooh, Blues Clues, the Sesame Street gang, etc.
I’d be dressed however she pleases (rompers, onesies, shortalls, PJ’s, and of course only the thickest, colorful/babyish diapers for her “lil pottypants”. Plastic pants also optional, the loud rustling alerting everyone around I do in fact need extra protection. More often than not, a simple babyish t-shirt, sneakers, and my diapers on full display (she’d say for easier checked) would be my main attire.
Our relationship wouldn’t necessarily be outright sexual. Sure she’d breastfeed me and she’d see my bits while changing, but she would regard sex as “grown up” activities, something I’m “just not ready for”. To keep me “protected” my “weewee” or “little doodle” as she would call it, would be fitted in a small chastity device, of course modeled in babyish colors. However for good behavior, cleaning, or special occasions like holidays/birthdays, I’d be unlocked and given a teasing, yet pleasurable handjob (either fully gloved or with a fleshlight designed to look like a baby toy of some kind), giving me a powerful orgasm she’d treat like any of my other accidents.
Overall, she would just treat me like an average toddler with the same guidelines and limitations. Early bedtime, no feeding/changing/bathing myself, limited privacy, and spankings/corner time if needed. Anytime I try to use “big boy words”, she would ignore it and act like I was a babbling toddler trying to form a coherent sentence, something she’d praise as part of her patronization. I’m just her big silly baby boy.
I guess the most “unrealistic” part of it would just be the wide acceptance of it. No real ridicule, just other people looking at me and thinking, “That’s one big baby to take care of!”. Being taken out while shopping, strolled around in the park, taken to the beach, anything I do I’d be just a baby along for the ride with my “Mama” as she’d want me to call her.