For India only - Major observations based on research, surveys from women, and condom size sales.
Endurance means fucking for atleast 7-12 minutes without losing erection and without sperm ejaculation on a Sunday holiday, or no stress free day without fingering or lubrication or using spanish fly or jodhpuri bhang. .
After office or on working day 5 - 7 minutes endurance is normal due to tiredness or stress. Anything below 5 minutes sperm ejaculation is poor/below average fuck and cannot satisfy any girl either partially or completely. She will remain hungry whole night and also the next day especially if one week before periods are due. Normally all girls say yes satisfied if asked and will lie even if she is not satisfied.
The formula to catch a girl if she is fully satisfied or not is that the girl will give you a sweet smile if she had orgasm and will kiss you hold you play with your hair, ears, face. The next formula is to ask the girl aur chahiye if she says yes that means she needs more and still not satisfied, if she says kitna karoge mujhe sonay do that means she is completely satisfied. If her face shows anger and says so jao abhi tumhara khara nahin honewala that means she has not reached orgasm and does not enjoy fucking with the person.
Girls - upto 24 - dick size + endurance. - horniest age group amongst girls 18-24.
Girls 25-29 - endurance. Dick size matters only upto a certain extent as by this age they have already had multiple experiences. So dick size may or may not matter but endurance definitely matters.
Bhabhis 30-35- endurance. Dick size matters only upto a certain extent as by this age they have already had multiple experiences.
Bhabhis 36-39 - dick size +endurance- horniest age group amongst Bhabhis peak age. This age group also loves threesome, gangbang.
Aunties 40-45- dick size + endurance- horniest age group amongst Aunties peak age pre menopause . This age group also likes threesome, gang bang.
Aunties 46-49 - dick size- mostly dry pussy, lubricants required, post menopause, so enjoy oral and anal. Very few enjoy vagina fucking, pussy loose but fuck to satisfy their ego, so endurance is limited priority. Dick size becomes priority to suck and fondle and anal.
Granny 50-53 - dick size- completely dry pussy, post menopause, so enjoy oral and anal. Very few enjoy vagina fucking to satisfy their ego, so endurance not a priority. Dick size becomes priority to suck and fondle.
Worldwide as per surveys of women escorts and prostitutes in terms of big dicks plus endurance both ,
Africans are no. 1 in fucking. Arabs - Middle East are no 2 in fucking. South Americans come at no 3 in fucking that is why lot of elderly ladies from around the world visit the 3 countries as sex tourists to have the best sex and hire toyboy escorts unemployed, college university boys as part time boyfriends and few of these women fund their education,sponsor visas, or keep them as a part time boyfriend.
In India as per surveys taken with women- Muslims, UP bhaiyyas, Sardarjis and the Mangloo Mamas ( men from Mangalore) are known to be good and aggressive fuckers with big dicks and can satisfy women easily. Rest are average to above average fuckers as per the survey.It also depends on diet, stress, medical issues, heart stent, bypass, thyroid, levels of androgens, (testosterone and other sex hormones) if there is deficiency. So each to his own. Cannot generalise for all Indians Testosterone levels should be checked once or twice a year.
The above is based on surveys so it will be different in cases of girls and women in USA, different in Europe and different in Russia because of culture, conservativeness etc.