When my girlfriend and I became physical at the beginning of our relationship, I was able to last a lot longer than I am now. I would last in the range of 55-60 minutes and sometimes it got to the point that she became uncomfortable. This has changed over the course of our close to 8 month relationship. I now can only last a good 5-10 minutes. I don't understand this decrease in my stamina, I don't take any medications or anything that could cause this. I am, of course, considerate to her feelings. I usually eat her out until she climaxes and then fuck her, because I would feel bad if she didn't get to enjoy it as well. I have heard about pulling out and licking her pussy whenever I feel like I am close, but I use magnums and the smell is pretty strong as some of you might know. This has never happened with any of my other girlfriends in the past. She says it makes her feel good that she can make me cum that quickly, but I still wish I could last longer. So does anybody have any advice as to what I could do? Oh and if it helps any, I am 19 years old.