Sex is a special, private activity that adults can do if they want to. In Indian entertainment, like movies and TV shows, there are rules about how much sex can be shown. Most of the time, it's not shown at all because it's considered inappropriate for children to see.
In India, there are laws that make it illegal to show too much nudity or sex on TV or in movies. This is why you might see characters kissing or hugging, but not much else. The laws are meant to protect children from seeing things that they might not be ready to understand.
Some people in India don't like the rules because they feel like they limit what can be shown in movies and TV shows. They argue that adults should be able to watch whatever they want, even if it's a little bit naughty. But others believe that the rules are important because they make sure that kids aren't exposed to things that aren't appropriate for them yet.
Overall, sex is something that happens privately between consenting adults, and it's not something that kids should be exposed to until they're old enough to understand it. In Indian entertainment, the rules are meant to make sure that kids aren't seeing things that they shouldn't, while still allowing for some romantic moments between characters.