So it is good to know your partner, and it is good to have a close enough relationship to them that if they end up with a disease, they will tell you that you have been exposed. One answer is to stay home. It will depend on what your agreement is in your marriage. Males do not have a G-spot to our knowledge. We are not even sure what it is supposed to be other than a bundle of fibrous material.
People talk about G-spot orgasms, but there is no scientific evidence of that.
Male and female genitalia are embryonically composed of the same material. If you give a woman lots of male hormones, her clitoris will start to become a little penis. I don't know whether you are a man or woman. Oral sex is much more precise and can be much more vigorous than intercourse. So if you have trouble having orgasms during intercourse, it might be easier to have them during oral sex.