If people keep questioning if you have a soul, give to the poor more often.
Movie: Half Baked (1998)
At first, you were enthusiastic about the idea of giving back to the poor through volunteering at a nearby homeless shelter. But after partying until the early hours of the following day, you realized that you'd rather be asleep than fix meals for people less fortunate than you. You have no excuse, which is why your friends wonder why they hang out with someone who seems to have no soul.
You have piles of clothes that you no longer wear that you could donate, and you pass that homeless shelter every day. Similar to lending a hand, helping out the poor not only leaves you feeling good about yourself, but karma will probably cast a smile upon you, too. As much as you like to pretend that nothing fazes you, you know being called selfish and uncaring hurts you more than anything else in life. Help someone out that needs it.