Well, outside of perhaps Burt Reynolds or Alec Baldwin, the sight of two gorgeous guys like Kline and Selleck locking lips passionately gave my day an absolute "lift"...
I have to agree with you there. That kiss looked really hot. I watched the film for the first time two days ago and I've been thinking about it ever since. That scene was the most passionate in the entire film. I love Howard's reaction after it is over.
The only other kiss between two men that is anywhere near as passionate is the one between Jack and Ennis in Brokeback Mountain when they see each other for the first time after the four year gap. I love that scene as well. I'm not usually turned on by two men together but in those two scenes I definitely was.