Flaccid penis immediately after ejaculating

Sexual health
1

Hi guys, asking a question on behalf of my partner as I know he's been a little curious, a few questions here;

He's been a little concerned as in the past his penis used to stay hard after ejaculation however, now it'll go limp immediately after ejaculation 99% of the time... I don't seem to think that it's much of an issue but then again it isn't my body. He doesn't struggle with ejaculating at all and is able to maintain an erection, so that's not a worry. 

Another thing he's noticed is that when he goes for a pee afterwards he doesn't get a stinging or burning sensation...although it's a good thing in a way of course it's still something that he notices. 

The amount of semen each time varies and I suppose a lot of factors contribute to that. 

I'm guessing that diet and lifestyle/habits are part of this but I'm not sure, hence why I'm asking. He is a smoker and smokes around 10-20 cigarettes per day and his diet consists of a lot of carbs. 

If you could share your views/experiences I'd appreciate it.

Thanks in advance all 

2

You don't mention his age, but his penis going small and limp after orgasm is very normal.  How soon afterwards he gets another erection, depends on the stimulation you provide (by being there, etc).  Longer term it is said that smoking and a diet without fruit, veg etc will reduce sperm count.  I can personally attest to the first condition, but I have never smoked and no longer miss out on fruit and veg so cannot positively verify the health benefits