It’s impossible to make a blanket statement about what all girls think of guys who wear shirts or not while working out at the gym because every girl is unique and has their own preferences and opinions. Some girls may prefer guys who wear shirts while working out because it shows modesty and a focus on fitness rather than aesthetics. Other girls may prefer guys who work out without shirts because it shows off their physique and confidence. Ultimately, the decision to wear a shirt or not while working out should be based on personal preference, comfort level, and gym rules. It’s important to remember that people go to the gym to focus on their own fitness goals, not to impress others.