To say that Jack was Ianto's security blanket wouldn't be correct, because he wasn't. There was just something about sleeping close to someone you know has your back that makes things a bit better. The smell of him, the familiar weight alongside him, it all added up in Ianto's brain to 'you're safe, it's okay to relax'. And he needed that, he really did.
Besides, dates were fun. Jack always enjoyed himself. Right?
Ianto clicked his tongue and shrugged into his own coat, fishing a red scarf out of a sleeve before he did so. "Please. Last time you watched a Bond film was with me back in Cardiff. Besides." Here, Ianto's eyes glinted mischievously as he wound his scarf round his neck. "He's so terribly hot and you do remind me so much of him..." With that, he sailed past smugly, hoping to make it outside before being tackled or something.