I need oral sex to stay erect - but my girlfriend doesn’t like giving it

Start by analysing the exact feelings you experience when receiving oral sex compared to how it feels to penetrate. Many people become conditioned to a particular type of sensation that maintains arousal and find it difficult to switch to a different feeling. Sometimes, this is linked to a person’s earlier masturbation style – especially if the associated sensations that preceded ejaculation were fundamentally different from the feelings of intercourse. With the help of your partner, it would be worth being creative and experimental about timing and sensation – and to try various ways to bridge the sensation – but that is only part of the challenge. You have become so focused on performance that a self-fulfilling prophecy has been set up whereby your fear of “failure” is making it less likely that you will maintain an erection. Forget about achievement and try to simply focus on pleasure and sensation, and on giving your girlfriend pleasure too. It is OK to lose your erection and start again. Two months is not a long time in sexual relationship terms. You just need more relaxed time to figure this out.