well if your really worrying about STD I would Recommend the NEOPREEN Condoms'. there drawbacks are they feel like using a plastic baggy and you need to hold on to them so they don't fall off. they also warn you not to use lubricant with the Rubber Condoms' they can brake. Lubricant's brake them down especially Vaseline. Recommend Neoprene and 2 French Rings One at the Base and one half way up they are to keep the plastic Condom on your dick.
well if your really worrying about STD I would Recommend the NEOPREEN Condoms'. there drawbacks are