very very cautious. because I am a bit hypocondriacs as well. so far I have sucked three dicks and I wish I don't suck any other dicks for the rest of my life.
I don't really like the taste. when I licked a precum, I was thinking like, I hope this guy doesn't have a STD. uuuh, seriously, I don't understand why some people like to suck dick that much.
actually how do we tell a healthy dick and unhealthy dick?
in of my hookup session, the guy asked me to suck his dick, and I politely declined and he looked disappointed. well I finally did, after we had a shower because his cock smelled bad.
it became my worst hookup ever though, I feel I was raped.