Thank you for your question. Well, there are two phases of your question. Coming to the first phase where you want your boyfriend to come sooner during oral sex. One thing should be kept in mind that when a person ejaculates earlier or later (in your boyfriend’s case it is detailed ejaculation), it depends on his psychological as well as physical characteristics that he might possess. Two of the major factors in his case are anxiousness and stress. I would advise you that you should sit with your boyfriend and talk to him regarding this. Your words might help him and he would ejaculate faster as you want. Coming to the second phase of your question, yes, there are 20 different kinds of sexually transmitted diseases which people might suffer. It usually happens when one person infected with a disease his sexual intercourse with other. Also, it can be spread if there is contact between mouth and genital parts. Most of such diseases cannot be cured. If proper medication is not provided in the earlier stages then it will become really difficult for the patient. Hence, it is advisable that you always use condoms when having intercourse with your boyfriend. Studies have shown that people who are infected by sexually transmitted diseases other than the AIDS have larger probability of catching AIDS. Hence, care need to be taken in advance because if you catch AIDS then there is no coming back. I would advise you to please read various online health magazines while you work at your knoppix computer. It will help you with your queries. Proper knowledge is very necessary before going for sexual intercourse. It might give pleasurable experience but it also gives a lot of infectious diseases also if proper care is not taken in advance. Good luck.