I come back and visit his room for long time. He said that there was a sponsor of lubricating gel. They sent him many types bottles to try out. Each color has a different viscosity or properties. So he want me to help him test it. Of course I want to help my friend. It's a lubricant for fucking. I'll fuck him without kissing Because I intended to test the gel only 🥹 We chose the blue bottle that had just been unwrapped. This colored is very viscous. The gel on my hands will be viscous and difficult to wipe off. But it lubricates well and doesn't dry out easily. I fuck him on bed for a while. We got up and went to try fucking in front of the mirror. It was good, then I cum when I was fucking him on the bed. In conclusion, I tried using only one color. Next time I go to his room again, I'll try a different color bottle.