I am in dire need of some advice in bed. So usually, I have sex with my girlfriend and I don't last too long, even with a condom. I try going at it again afterwards, but I have trouble keeping my erection. This isn't a problem in masterbation though.
One night, she really wanted to have sex. I had masterbated the day before, and was a bit hesitant (I usually do not masterbate before I know I will have sex). However, we had little foreplay and I was able to last for around 3 ejaculations nonstop. I was amazed, and I was sure that my curse was lifted.
However, we tried it again recently and well... I was back to my old self again. This time, I went back to my old habit of not masterbating at all for a couple days prior to intercourse. She isn't a big fan of foreplay and I don't know how I can satisfy her needs like I did before.
My question is... what role does masterbation before sex play in the amount of time a guy can last in bed (duration before ejaculation, recovery time, and endurance)? What did I do wrong the second time? Any advice would be greatly appreciated.