Comforter

I’m 17, I’m autistic and when I’m upset I drink chocolate milkshake out a baby bottle (when at home, not in public). Well I’ve been with my boyfriend for a little over 2 years. Last year I told him about this and he said it’s weird not normal and I act like a baby. It’s not that often I do it but he still made me feel bad it. If your partner had autism (or even nothing wrong at all, just found it comforting ) and drank out a baby bottle as a comfort mechanism, would you be okay with it or would you find it weird and babyish?