I find that after a workout, when I have sex I seem to have soo much more control over my orgasm. I can even delay it using kegals with ease.
Also, since I put on weight again after losing it, I dont last as long compared to before, the urgency to buss my nut comes a lot quicker.
Another tip is to start off slowly, instead of sticking it in, wham bham thankyou. Enjoy the moment with your partner, slow steady long strokes can do really amazing things, its not always about hammering the pussy. I find that the woman gets a lot more wetter, then naturally you will go faster as its more wet and for me, the wetter the pussy the less I can pound away with control