I use Minksheen on Riot and I'll rub a tiny bit of coconut oil on my hands and run them down his back and legs as I'm rinsing him off. The two together smell really good and it makes him a little bit softer. I leave it off his head though as it makes it look greasy.
I have used a few dabs of my people conditioners in the past though and it doesn't seem to hurt him but it did make him smell like strawberries lol, not very manly!