Hi Thank you for asking HCM I have gone through your query. Your boy friend s problem is most likely due to anxiety/performance anxiety or stress. This is associated with loosing erection when about to go intercourse. Organic erectile dysfunction is characterised by having no erections while sleeping or early morning. Relaxation exercises like breathing exercises will help in reducing anxiety and stress. Enough foreplay and giving him your support also helps. If that is not helping then behavioral therapy with sexologist or psycologist will be helpful. If still not helping then SSRI drugs like dapoxetine will help. Hope this may help you. Let me know if anything not clear. Thanks.