Small blue ( Cupido Minimus) butterflies feeding on my hands

Last summer me and my husband travelled through Europe. We spent two weeks in the Italian Alps, in the beautiful Antrona Valley. Both of us love hiking. I took these pictures during our lunch in the hillside : I just ate sardines straight from the tin, and a smell immediately attracted a swarm of butterflies. I had some even on my other hand which held the camera. There are quite a few blue species and they are very similar in appearance. I think these are the so called Small Blue, but I might be mistaken. Their feast lasted nearly one hour. I don't remember did they leave me and flew away or I had to shoo them gently away because we had to continue in our hike. I knew they love poo and sweat, but it was a bit surprise for me they love fish.