I think he is just nervous. He'll have spent a long time thinking about sex, and planning it all in his head, and now, when he has the opportunity, he is distracted by the practicalities. I think sex is quite tricky for guys, but when they practice, it becomes second nature.

Getting his penis in is just the first step. Once he manages to get hard, and then in, he's going to be faced with a whole new issue of moving around in way that actually feels good. He'll have spent a lot of time masturbating and it's gonna be weird trying to have an orgasm with something over which he has very little control.

I'd try and give off a vibe of absolutely no expectations, and when he does something good, let him know in a sexy kind of way. You're just gonna have to lay there in a non-threatening manner for a few weeks, but by the time he learns, you're gonna have a guy who is perfectly trained to your own needs, so it's definitely worth the patience. I'd possibly try some ky-jelly, because that will make it easier to go in. Also, you can focus on other sexual acts while he gets his confidence together - if you make sex a big, final goal, then he's always gonna be nervous, but you can make it just one of the many fun things you can do together.

99.9% it is psychological.

The Dr. will check for undiagnosed diabetes and hypertension (high blood pressure) and a few rare things associated with his male parts. He may prescribe ED meds even for an anticipated placebo effect.

But if he becomes erect he is okay physically.

Suggestion: At your age it is very likely sex has always been rushed for one reason or another (i.e. don't want to get caught). So, get yourselves in a situation where there are absolutely no pressures including time pressure. If you have to, go to a hotel and lay in bed naked together for hours. If you have to (and girls hate this) watch porn on the hotel TV but that is a last resort. No expectations, no pressures, and 24 hour/day nudity (okay, 23) and things will get in sync and it will happen, maybe not the first day, but it will happen. And he will love you more than life itself - not because of the sex, because you helped him and didn't humiliate him.

This is likely a hurdle that will be something you both laugh about once you get over. It sounds from a male perspective like he's phyching himself out before he can disappoint you sexually. For a man the first time is terrifying despite how me may dismiss his anxiety. Few men manage much their first time with a woman. To make matters worse each failure with you compounds his frustration and makes intercourse that much harder for him.

It could help him a lot to focus on something other than the act. What he isn't concentrating he can't obsess about. If he has an inclination towards a fetish he's done half of the work for you. Incorporate items that arouse him normally into sex. It will give him a hand-hold to link sex with you to the natural comfort he has with masturbation and it creates a focal point that will distract him from fears of failure.

The easiest way for a man to have sex with a woman is organically. The more you try to orchestrate sex or frame it romantically the more pressure it puts on a man. Be intimate and genuinely affectionate with him. Don't try to be seductive, just be available, enjoy being close with him, cuddle, shower together, help him undress for bed without pressuring him for what will happen afterwards. Speed is definitely an issue for a virgin male. Feeling rushed or that things are drawing out too long can intensify anxiety. It's very important to let him set the pace and take the lead romantically as much as possible.

Go down on him, give him a good blow job, say dirty sexy words to him, teach him how to give you oral sex,