Interesting? Dan wouldn't have used that descriptor - what was interesting about a man who had lost everything, even his life, constantly scared of himself because of the temper that was an inferno, burning so hot it didn't last long but when it did burn, he tapped into the ghost of his father that he tried so hard to squelch? He was so terrified of the person he was during those years lost to booze and drugs, without a home, beneath bridges and sitting on steps, breathing without really being alive, that he'd gone without any contact at all. He'd shut it all away, shut himself away.
Then Abra came along and took a sandblaster to the walls around Dan's heart, seeing the damage, and he felt so exposed but he loved her and he would die for her and he did.
Thus, when someone asked to kiss him because they found him interesting, he got scared all over again. Maybe he shouldn't do this; the unknown was dangerous and terrifying and yet he'd gone so long without seeing any sort of affection (before tonight, which - did that even count, if it was compelled affection?) he was curious enough to squelch his fears for just a little. "Yes," he murmured, unsure where to put his hands - so he just settled for resting them on Bill's waist.