Boyfriends horny dreams

My boyfriend of 2 years texted me today about how hes been having super horny and sexy dreams, so I was curious and asked about them. He said they were about tying me up, and me biting him and making him bleed, and a threesome. I didnt think anything of them because we haven't seen each other in a few weeks so I know hes probably just horny. But I have told him that im not comfortable with a threesome before. When I asked who else was In his dream he said faceless girls. I know they are just dreams but I asked if he wanted to actually sleep with other people and he said idk.