1000 is gratuitous and dumb.
Say all the men have their condoms on, are in a line, and it's rapid fire with like 5 seconds in between one guy pulling out and the next guy putting in.
But you also have to factor in all the times she needs to be lubed, drink water, and stretch/change positions so she doesn't cramp.
Each guy can't have more than like 40 seconds in her. That's not even having sex.