There are other people and forums that cover 'Dot and Bubble' with greater nuance than I can - and I'd advise you read the Reddit because there's layers to unpack in this one.

All I have to say on this episode, other than I hope some people were left feeling uncomfortable, is that I owned 'Itsy Bitsy Teeny Weeny Yellow Polka Dot Bikini' on both cassette and vinyl, and I won't be judged for it. #DoctorWho