Dips are more pre-disposed to producing dysfunctional mechanics than most upper body exercises. When performed incorrectly, dips will wreak more havoc on the shoulders than just about any other movement.
However, when executed with perfect technique and appropriate body adjustments, they're actually therapeutic on the shoulders. It's important to master the correct form in order to reap the worthwhile benefits while avoiding the potential drawbacks.
I'll have to admit that my mind was elsewhere. We were all sitting in the lounge at the Los Angeles Strength Seminar and everyone was drinking wonderful things like beer and bourbon, often together. One lovely young woman was drinking a wine spritzer. I can allow that, if you're a lovely young woman.