Everybody has an opinion, and who cares?  Do some web research.  TL;dr: You CAN get various (mostly curable) STDs from BBBJ. But it's fairly uncommon. If you're worried, go all covered. I take the (really slight) risk on BBBJs as do most guys, but it's still a non-zero risk.  Do what you're comfortable with given your circumstances.

Nothing is perfectly safe but based on  doctors involved in clinical practice your chances in getting a serious disease from oral sex are remote.

http://www.medhelp.org/posts/STDs/oral-sex-question/show/2159728

http://www.medhelp.org/posts/HIV-Prevention/Ejaculted-in-the-mouth---Different-circumstances---Please-help/show/1757568

 
Oral sex can usually be considered safe sex. There is a low risk for all STDs and virtually zero risk for some of them.  This has been discussed previously; please read the questions and replies in the threads linked below.  

http://www.medhelp.org/posts/STDs/Oral-sex-risk---unprotected/show/1700243

http://www.medhelp.org/posts/HIV---Prevention/Still-scared-of-a-possible-HIV-transmission/show/141587

no Disease can survive in your stomach acid, so I started swallowing lol

Biggest risk in terms of likelihood is getting gonorrhea from someone that has pharyngeal gonorrhea.  Next most likely is getting herpes type 1 from someone shedding virus orally who has HSV1.  Most other studs are extremely low risk from BBBJ for the receiver.