I had no idea about condom size the first time I had sex and had to stop after the regular sized condoms made my dick totally limp! After that I have always used magnums and I have noticed a big difference. Following the logic that I had no idea how comfortable a condom could be until I tried magnums I am tempted to try XL's but am worried that they are for the HUGE dudes and I will end up looking like a total idiot! Hah!