Chem sex is more intnse and tends to last longer (2-6 hours), makes you super horny, makes your skin so sensitive to the touch. Downside is youll probably feel like shit the next day, and you may have done things sexually that you normally would not. Not too bad if you're with your partner or GF/wife, but if you're with a hook up, it could be bad news if for insrance you didnt use protection