Okay, think about this. He only does one night stands and he blabs about it too. Clearly he has no respect for the people he sleeps with, but also he's at a high risk for STDs which means you would be at a high risk too even if condoms are always used because they are not 100% effective against everything. On the bright side, you'd be going into it with your eyes wide open, but is it really worth the emotional pain and potential lifetime consequences?