From my experience a speedo’s most comfortable, if I really have to wear clothing, like at most public beaches. (That’s why I tend to avoid them)
I also think it’s ok to wear a speedo or bikini (bottom only in my case), or go nude, no matter what body type a person has and for whatever reason they choose, because it does require and inspire confidence.
Seems to me that most people cover themselves, because of conditioned shame/fear.
To me, being comfortable nude is indicative of holistic wellness.