It would really depend on how well I know and trust the guy. If it was just a pick up for the night then yes he wears a condom, but if it is a close guy friend/boyfriend who I knew I could trust then no I do not require them to wear a condom.
For those who are in non-monogomous relationships or hooking up with someone, do you make them use a condom when you perform oral sex on them?
I wouldn't give a blowjob to someone I'm not in a monogomous relationship with. Because of that, I wouldn't need to use a condom. I don't think I would enjoy sucking on a piece of latex. I enjoy having him in my mouth. Not a piece of latex.
While it's good practice i have never done so. if i knew that the person had some sort of std or sti i would encourage using a condom for oral sex or would offer up a handy if they did not want to do that.