When “doing it”, are you regularly thinking about putting clothes away, which clothes to wash next or if you emptied the washing machine? Or when you washed your clothes the last time?
Is it distracting to the point you get soft (for penis havers) or dry (for ADHDers with vaginas)?
I’ve always had trouble getting to the end. It requires great concentration and a partner who is willing to be still. It took me four years from the first time I had sex until I was able to cum.