Me using it on me with her watching - meh
Her using it on me - better but still cold
Her blowing me while I used on me - best for my pleasure
Me using it on her - best of all - she seemed to enjoy the ridges, but the piece between thumb and forefinger got in the way.
Overall, fun exploration and the best part was exploring each other and communication. It was fun once, and I think other toys are better.