Dear LP readers: My roommate is constantly having sex with women in my presence

From a male LP reader
My company transferred me from PH to Abuja, and you know how Abuja is with accommodation issue, so I asked my friends if they could help me out and get someone I can put up with for some time till I'm settled to get my own place. Finally I was introduced to a guy. I don’t know him but
he offered to help. Now the problem I have with him is that he brings different ladies into the house. It’s a self contain apartment with just one bed. He constantly has sex with the ladies in my presence both night and day. Sometimes, he will ask me to join him. Most nights, I cant sleep because of the moaning & grabbing of sheets, I have never been embarrassed like this in my whole life
At times I feel like killing the ladies at first sight when I see one. Since am the one who needs help, I can only keep quiet so it doesn’t look like I am giving him orders in his own house or tell him how to live his life. So here goes my question. As a guy, can you do such a thing to a fellow guy or as a girl, will you stoop so low and have sex with your man or bf in front of another person? It's disgusting really. I just don't have anywhere else to go. What should I do?