AIO Found something behind computer? Partner of a year.

I (33f) have lived with my partner (41m) of one year for just over a month. Our sex life has been pretty consistent up to right before moving in together.

It was a rushed move and was stressful from the beginning but for the most part I thought it went well.

I started noticing a change in my partners behavior from pretty much day one. Sex immediately ground to a halt. He’s been spending a lot of time on his computer but I already knew he was a gamer.

However tonight was my day off and I took some time to clean the house. I found this behind the computer in his gaming room.

What is this thing? Should I say something? It kinda makes me sick to look at at.