Tattoo Artist aims should be wearing gloves when tattooing.

OP I agree and this seems like a good small issue that might be effective if you created a petition. There are already examples in game where what the Sims is wearing changes when the engage in an activity.  The Skis spring to mind. It may be too late to adding them by release but I think a patch  to add wearing gloves when you use the Tattoo Equipment is more than fair.  Encouraging health and safety is a noble effort in my view.