Yes, in most cultures and societies, swimming in the ocean or any public body of water without a bathing suit is considered inappropriate and rude. It is generally expected that when you go swimming in public places, you should wear appropriate swimwear, such as bathing suits or swim trunks.
Swimwear serves both practical and social purposes. From a practical standpoint, it is designed for swimming and provides comfort and ease of movement in the water. From a social perspective, swimwear is considered appropriate attire for public settings like beaches, pools, and other recreational water areas. It helps maintain a level of modesty and ensures that everyone feels comfortable and respected in shared public spaces.
Swimming without proper swimwear could be seen as indecent exposure, which is against the norms and regulations in many places. It's essential to be respectful of local customs and follow the rules and expectations regarding swimwear in the location you are visiting.
If you are uncertain about what is considered acceptable swimwear in a particular place, it's always a good idea to research local customs and regulations or ask the staff at the location you plan to visit. This way, you can ensure you are being respectful and considerate of others while enjoying your time in the water.