[He might not be actively freaking out about it but Spike clearly looks more than a little overwhelmed by this all. As a result Ianto finds himself being even more affectionate than he usually is, pulling him close and returning that kiss while his hands run warmly up and down his back and comb through his hair, calming without trying to make too big a deal out of anything.]
Don't get me wrong, I like the real you better but you certainly looked like you were enjoying yourself.