Look in the female end of the hose for the washer. They're usually black or an orange - red color, but they could be anything. If there's one there, take it out and put in a new one. If there isn't one, then that's your main leakage problem. Go into any hardware store and go to the hose section. There will be several different types of washers. Usually the only difference is the more expensive ones are made of rubber, or a better grade of rubber and will last longer. Even the good ones are still cheap. If there is a washer, and it's hard to get out, make sure you get it out somehow - use a screwdriver. Don't put a second washer in on top of another one.
Bill