thats a good rule to have! don't guess..it's either a rule you want to have for yourself or not...you gotta be sure!...i've thought about it that way and it's not steered me wrong, so imo its a good rule...despite people ignoring it and advising you to bring condoms to parties anyway, as if you'll meet a girl and have sex that night (i can tell you, the relationship probably won't end well, seeing as how again, imo, you can't end up loving someone's personality AND getting it in return after an hour or so of knowing someone)....im not advising against using condoms of course, but I'm agreeing and making sure that you know you gotta be confident in your beliefs about it, or you may get screwed over literally and emotionally