What a cute little clown he is!
If Lenny lets you brush his teeth, that's great. My kitties don't tolerate having my fingers near their mouths, so I don't brush their teeth at all. I'm not worried about gingivitis either. They have regular check-ups, and in the 11 years I've had them, each has had her teeth scaled twice, So the amount of stress it would cause them (and me) for me to brush their teeth isn't worth it for me. I'd rather just have their teeth cleaned every 5-6 years.