Does a kiss match the chemistry of a skydive?

Literally, no. Kissing and skydiving may involve some overlapping brain systems and arousal/reward responses, but that does not mean they trigger the same set of chemical reactions. Skydiving studies have examined acute stress responses, including changes in adrenaline and beta-endorphin. Research on romantic love or intimate touch links it with reward networks and possible involvement of dopamine and oxytocin; direct evidence for passionate kissing producing an identical biochemical profile is limited. The claim is a catchy but oversimplified analogy.