He sat up at her words, eyes wide and unseeing. He tilted his head, listening. He could feel her there beside him, he could feel her breathing. He was fairly certain it was a woman, but he couldn't have put a finger on how he knew. He had no idea who she was, or why he was in bed with her. Well, he could guess, and his state of undress kind of made it obvious. He assumed she was undressed too.
His brain caught up with his body in a matter of seconds. He had no idea who she was. He had no idea who he was. He frowned. He really didn't want to tell her he had no idea what was going on. The sex was a given. Other than that? He remembered nothing. He didn't even remember the sex, which was a shame. He wished he remembered that, because that would give him something to focus on.
"Yeah. Some night." It must have been good, because it blew his mind right out the window. No memory, at all. He didn't even recall his own name.