Manufacturers may want you to believe their product provides extra sensitivity, but this is a highly subjective feature. Condoms advertised as extra sensitive are not necessarily thinner than others. Regardless of the label, you won t know until you assess its flexibility, contour, and lubrication. Advocates of polyurethane condoms claim they transmit body heat better than latex condoms. The ultimate in sensitivity is provided by natural membrane condoms.
Many users say they can t even feel the condom.
Fewer studies have been reported for anal intercourse, but preliminary findings are similar to those for vaginal penetration. Most studies conclude that the likelihood of breakage from human error is far greater than from faulty manufacturing. Natural membrane condoms have pores. These pores are much too small to permit the passage of sperm, but viruses like HIV and hepatitis B may be able to wiggle their way through the layers of sheep intestine, according to lab studies. The new polyurethane condoms appear to provide both pregnancy and STD prevention, but testing has not been extensive enough to establish failure rates with any certainty.