Jan. 27, 2008: Angelina Jolie and Brad Pitt kiss at their table during the 14th annual Screen Actors Guild Awards in Los Angeles. So, why does kissing feel so good? Researchers from Lafayette College in Pennsylvania may have uncovered the answer. They found lip-locking actually sparks an increase of hormones in the brain. Due to a series of complex chemical processes, those involved in kissing experience a combination of relaxation, excitement and love, according to the study.