Starting a platform for dating, need traffic ideas

Hello, BHW forum members and colleagues,
A client is launching a platform for dating only for the German market auditory.
Focused on men who buy a pack of coins to chat with women that are registered on this platform.
The website is under construction at this moment, however, the client wants to advertise on porn websites. Any ideas and suggestions to generate traffic?

I think social media is the way forward for this. IG, FB and tik tok. Maybe also Reddit but who knows.