So, this is not necessarily a BDP, but I assume this issue happens more for us big ones. So please follow me. I also apologize for this being such a humblebrag, but if you can look past that, please contribute with tips, tricks and ideas.

My wife and I have been together for 20 years (we met at a very young age). For the first 15 she was on the pill, and due to my size she couldn't do PIV for too long. Not an issue with me; we just did it often instead of too long, and kept PIV time at a "minimum". After we had both our kids, I got a vasectomy two years ago. Now here is the "problem". After she stopped being on the pill and I got the all-clear, her sex drive has exploded, and she wants the D hard and deep, and quite often. I love it, of course, but she feels so goddamn great, and she is still super tight and wet, so I can't help ejaculating pretty quickly. Like after 15, maybe 10 minutes of PIV. She wants me to give it to her rough for at least twice as long, but no matter how much I try to delay, I just can't. You guys got any tips for a seasoned D with new challenges?

Edit: Wow,so many great responses! I am very thankful for such a great community when an actual (BD) problem is presented. I am particularly drawn towards suggestions about kegel excercises, (and inverse kegels), and experimenting with my refractory period. I've actually never tried to go for round two - but I don't know what I am capable of before I try it. Peace and love from a happy man, who may soon be even happier.