Hello Dr., I am a 42 years old man and unmarried. Not interested in marriage also. For my sexual needs, I am planning to start relationships with the unknown females from different sources. Need your guidance, so that I can protect myself from HIV during the plays. 1) Is it fine, if I will start TRUVADA for a month and then start the sexual relations with the unknown females?, so the risk of HIV will can be 0%, even if I am involve in the play by without any condom and the unknown partner is having HIV. 2) Is TRUVADA 100% assured precaution to HIV infection? 3) If TRUVADA is not 100% assured precaution to HIV then will this be a good approach to use condom in every play? 4) Is there any risk, if I use condom during the play and the unknown partner is HIV infected? 5) Why it is advisable to put off the condom after play immediately? It could be valuable for avoiding pregnancy but for to avoid HIV infection, putting of the condom immediately after the play has the bigger chance of the condom slides fully over the erect penis surface, where there is a chance of contact between the opening of the penis with the base of the condom, which could be with some vaginal fluid during the play. In this case, if the vaginal fluid at the condom base get contacted with the penis opening, then is there any risk of HIV to the male partner? thanks