That’s because, if it’s in your wallet for too long, the temperature and consistent friction can render a condom useless. “Friction from opening and closing your wallet can cause them to deteriorate in quality,” warns leading condom brand Lifestyle. Additionally, the condom could break if it comes in contact with something sharp. “Carrying a condom in your wallet, where it may get folded or sat on, can break or tear the wrapper. But even if the wrapper looks fine, the condom inside might not be,” writes Amy W. Anzilotti, MD, for TeensHealth. “Condoms can get pretty worn out if they’re carried around in a wallet. That means they can break more easily.” Another common problem is that people tend to leave condoms in their wallet for a long time. “Older condoms are also more likely to break when used. Body heat is another thing that causes condom material to break down over time,” Anzilotti explains.ae0fcc31ae342fd3a1346ebb1f342fcb And while keeping a condom in your front pocket for a few hours is OK, Anzilotti recommends avoiding putting it in your back pocket, due to the heat that comes from sitting on it. So, where’s the best place to keep condoms so that they’re still safe, but handy? Inside a breathable container within a bag or purse, according to Anzilotti. RELATED: For more up-to-date information, sign up for our daily newsletter. And before using any condom, you should always do a swift quality control check. Lifestyles advises, “When it comes down to it, always use common sense. If a condom looks brittle, discolored, or like it might rip, throw it away. Fortunately, condoms are typically inexpensive, so it’s always better to err on the side of safety.” For more dating tips, check out This Is the No. 1 Turn-Off for Men, According to a Therapist.