I used to have this problem too.
Didn't want to take medication or anything invasive.
Happened to read up on Kegel exercises for men.
Been trying it for a few months and there seems to be some improvement.
It even seems to improve the hardness of erection also.
https://www.mayoclinic.org/kegel-exe...h/art-20045074
somewhat similar to bro funboi's suggestion, but this is everyday... Bro funboi's is during OJT!!
And then again, it also depends on the partner you're with.
Sometimes for me pump 10 - 20 times ejaculate. Sometimes with another girl pump 30 mins still can't cum...
Hope this helps.