[ He has no right to judge, because he knows exactly the kind of reaction Tyki brings out in people — he used to do the same thing. They're more similar than Ianto perhaps realises, so much so that Spike is a little worried about what meeting up with Tyki will do to their relationship.
One thing at a time. ]
He won't touch you. I got his word on it and he knows what happens if he breaks it.