Sexual compatibility?

It's not all the time this happens but recently I've been noticing something in my sex life with my boyfriend.
Our usual is more than one round every time but some nights he can't go again. Which is understandable for various reasons. But what I've noticed and what he believes to be correct or the reasoning too for not being able to always go again is if apparently it gets around 8pm. He starts to get tired and it prohibits him from going again. Tonight we had one round then after (this was around 8) we tried and he started to go again but he literally just got really soft and couldn't continue after about three thrusts (sorry for those details). He didn't appear tired at all but said that was why. He didn't even attempt to try again it's like he let it get soft and that was just it.

My boyfriend gets tired sometimes early like 8 or 9, but not always. He didn't seem tired tonight at all but apparently was. He said to me he gets tired and that's why we can't always go again at night and suggested from now on we just do it earlier in the day.

Well I don't mind earlier in the day but at the same time I don't want to have to limit my sex life to before 8pm. It's like I can't win then, it's either rush sex as soon as I see him or have it be at a later time and have awful half assed sex. I'd like to have sex with him at any time and hope for the usual but it seems at 8pm or later he just can't. Doesn't that seem unusual? Then it made me wonder what it'd be like when we move in together or get married. If we both worked or one of us got home later and was in the mood would it just sadly not happen and be utterly disappointing because he'd be "too tired". I almost fear a possible sexless marriage or one that isn't totally satisfying.

Sex isn't the most important thing, and I know that. I love my boyfriend so much and for so many other things.. but the whole sex not being the "usual" or as good at/after a time which is early in my opinion (8pm) seems so odd and is kinda sad. I don't know what to do or what to think.

What's wrong with wake-up sex? Or kitchen sex? Or a nooner?

What is wrong with going just once? Personally I would find it tiresome to have sex more than once every time I did it.

How many times a week do you guys have sex?

what?...i cant even imagine to have less than at least four rounds :O ...have you tried some long hot foreplay?if the foreplay is good enough,he can go over and over again until he will dry out like a mummy...and even without a foreplay he should be able to do at least 3-4 rounds...

Make that one round of sex so good that you don't need another ;-)

Make him put off his orgasm until you've had all yours.

I think his body just get sleepy around 8pm. I don't know of too many ways to prevent this. Maybe take 8333% B12 pill at noon, see how that works. Those energy shots with lots of B12 helped me with my energy levels. I drank a whole bottle and didn't sleep a wink that night. Now I only drink 1/2 bottle and I make sure it's before noon.

I also wonder if Viagra might help in this case. Or not. You just have to try some things, and if those don't work, deal with the fact that he's sleepy by 8pm. What if you let him sleep at 8pm, then you wake up him at 11pm after he's had 3 hours of sleep? Give him a nice bj to wake him up.

With the natural testosterone cycle, T peaks in the morning right after sunrise. So that's a good time for him.

Since the issue is that you're only having sex once, I'd concentrate more on that once. Make that once last and make it count, so you don't even feel as if you need to go again.

Last girl I was with would orgasm 3-4 times during one session and even if i wanted to go again i would turn around and she would be snoring =p!

you should do what Winter-Dreams said and make that one session count.

Although i get the thing about making the best of the one time she can get it, its not unreasonable for her to want it more than once? We have all been there, wanting it again and again ... Jesus, i bet the majority of us are still like that? Have u tried some kind of sensual massage? Im guessing if u realise that there is a certain time of day that is difficult for him, he is realising it too?? He is probably a) dwelling on it too much, and b) scared shitless when it comesto 8oclock in caseu make a move. Try relaxing him with the massage thing. How old is he?