Watching sad movies can be  alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance   alcohol also amount brain colleagues distressing drama effect emotional endorphins experiment geology high just painkillers psychological reason system threshold tolerance