The famous Red Light District in Amsterdam is unofficially divided into two parts: the so-called "tourist" and "clientele" areas. The tourist part of the district is more tranquil, hosting the Museum of Erotica and the Casa Rosso erotic show theatre. The theatre in question is not hard to find, but whether to enter or not is entirely up to you, as you will witness real and explicit sex acts performed by actors on stage. The recommended age for visitors is 21+, and the show consists of 10 scenes that loop, so if you decide to step in and then realize the performance is repeating – you've seen everything it has to offer
https://intravel.net/amsterdam/entertainment/teatr-seksa-casa-rosso-50