Their sessions are just a play for the Camera. As long as they fuck they get viewers. The more viewers they get then they get paid extra. That's why they go at it a few times a day awake or sleep.
I seen a bottle of something one day on the table but I couldn't make out what it was when I tried zooming in on it. It was a similar shape and color to a Spanish Fly or Horny Goat Weed Bottle. When Alina and Anton were with the project he always went to a shelf by the TV they had and always took something from a box then went for a glass of water and I suspect he used the same stuff but he never fell asleep while using it as he likely never took a high dosage of it. Anton could fuck go have a shower and 10 minutes later still be hard the whole time ready to go for another round. Whatever they use they should pass it on to Paul it would boost him up immensely. Leora would be surprised when he goes from a dud to a stud.