Jack drank because Jack wanted to drink -- there was nothing he wanted to escape, merely feel good for a few hours. And right now? Jack was feeling bloody fantastic... a feeling that was only was going to intensify if all went to plan.
For the most part, Jack was in complete control of his mental faculties. Buzzed, yes, but completely in control. And there was a beautiful woman in front of him -- one he'd been admiring since she lived here. Give Jack some credit for not just putting himself into Gwen's bed and letting things take that course. Instead, he planned it and waited until they were both drunk.
He kicked the door closed, arms loosening as she turned to face him. Oh, Gwen, you really shouldn't have bit down like that. Jack swooped in, quickly kissing her and attempting to take hold of that bottom lip. "If I'm so awful, what are you doing still here?" Jack asked, drawing her in close.