If that first reason is what I think you're talking about, hover your pointer over the "back" button that you would use to leave talking to them and it shows a tooltip with most of their stats.Two reasons, there are stats that you can see from the phone but nowhere else and b) if you run out of other ways to raise trust/love/lust
Unless they already are and I'm missing them, I think it'd be swell for favor/love/lust to be displayed somewhere on the photo interaction page.