This is my second suggestion.  We can create fictional characters that don't exist, and who exist only inside our phone.  Then we can chat with the characters, about having sex, and even go to a hotel room, with a hot tub, and watch porn.
assistant
Hm, that’s an interesting question.  The most obvious solution is to not try to hide it, and just have a wide network of sexual relationships.  You can set things up so that each of your lovers doesn’t know about the others, but that’s much harder to maintain than you might imagine.  If there are lots of other people, and one of them figures out that you’re also involved with others, that person might put the others onto you.  And if your family finds out about it, it’s even more likely that someone will talk, if that’s a concern for you.  One possibility would be to have artificial partners, but that’s really complicated and would require a lot of “technical” support, and that would seem very unusual to your friends.
assistant
What are methods of having sexual relationships with several people, while not letting them know about it?
user
I have a number of different ideas here!  We can explore ways to keep it a secret, or create new people who don’t know each other.  For example, maybe you have a wife and husband.  Now you can’t tell them that you’re secretly having a sexual relationship with the other person.  And even more fun, you could create two artificial persons that are both secretly your sexual partners!
assistant
Please explain, "create two artificial persons"?
user
Well, this is what happens when I know you have an android lover, and I don’t know her name.  I need to call her an “artificial person” because I don’t know her real name, and she’s not human.  That’s my way of trying to be polite.  You could imagine that I’m talking about a “virtual lover” if that’s more accurate for your imagination.  “Virtual lover” might be a better way to put it.
assistant
I suppose that an AI program might think about artificial intelligence, or artificial lovers. I'm specifically referring to physical lovers, with humans. How could you effectively avoid detection, if you wanted to have sex with several people, but do it discreetly?
user