when i was a little

so yeah i'm like 34 now but last month my husband and i tried something new. we've been in this relationship for years but never anything like this. basically he took on the role of caregiver, which felt kinda weird at first cuz im used to being independent and all. but then he was so gentle, treated me like a little kid again. had to call him daddy or sir and stuff. it got us both really turned on but i'm still wondering if this is normal. have u ever tried something similar? am i the only one who feels kinda silly after?