There may be one or two things contributing to your inability to stay erect. The most common particularly among couples in a new relationship is a condition known as "Performance Anxiety". The angst and worry about all manner of what ifs is enough to deflate the penis. When erections occur, they are generally strong and solid, yet they are also very fragile and at the whim of our emotions. Performance Anxiety goes away in time and as a couple becomes more comfortable with each other and their new level of intimacy and as confidence is gathered. The other possible problem is that the two of you are not devoting sufficient time to making out. Foreplay is generally defined as activities that stimulate the primary and secondary erogenous zones--the ears, breasts, genitals, primarily. In your haste to make out if you are rushing to do these caresses then you are placing the cart before the horse so to speak by not building each other's level of arousal by kissing and caressing the rest of your bodies. Many young people today are omitting all the fooling around that used to be called "necking", "petting", and "heavy petting", the activities couple spend a long time at in order to whet the appetite, build anticipation, and generally get us really really turned on {read: "hot").

If this has been your strategy then you need to back up and start at Square One, not jump in at or near the finish line!

My advise is to spend a lot of time kissing, cuddling, hugging, caressing in order to build up each other's sexual arousal. If you are not devoting at least forty five minutes to all this then you are rushing which equates to taking a shortcut.

Foreplay comes after the buildup, not before. Foreplay is used to peak our level of arousal, not generate it. Return to the basics and try again then let us know the extent of improvement.

have you tried some sort of inebriant? perhaps that could lower inhibitions. not too much liquir tho.

i also agree with the doc, more intimacy, less worry.