It's a nice kiss and maybe part of that is because it's been a little while since he was kissed last, but it definitely has something to do with Martha too. He wouldn't go so far as to say he has a crush on her, it's not that far gone yet, but the flirting and camaraderie has brought some nice feelings to his life.
"Not bad at all." he smiles, sheepishly, trying to comb confetti out of his own hair. "This really gets everywhere."