Is altruism an aphrodisiac? If it’s heartfelt, it can be. Local charities, nature conservancies and other service groups are often looking for spring and summer volunteers. Take your best girl and spend the day cleaning up the local stream. Help Habitat for Humanity build a home for a family in need of shelter. Chaperone a field trip for kids at risk. Whatever the cause, making a date to do something that gives back to the community will give you a sense of satisfaction, whether it leads to getting some or not.