Can we digest viruses?

I don’t usually involve myself in free sex but lately I feel like to try to do that (at least I’m single now). The problem here is that I’m afraid of STDs (especially the HIV/AIDS) even though it’s not that popular here. I just want to have simple oral with someone but I don’t want to ask if he has already taken his regular health check since I’m afraid I’ll loose the ‘trust’ between us. I also don’t feel like to use condom in oral. In my opinion I think that viruses can be dissolved by our stomach acids but I’m also think that they could pass it and get into our blood circulation,in oral case. Can someone please clarify this matter?