For comparison, mid-40s and a competitive cyclist (very fit).
Normally 5 a day and 3 per session, but it's usually twice before falling asleep, twice when we wake up, and once in the afternoon.
I go twice without losing my erection pretty easily, especially after a few days without. Current GF has amazing pussy control and can milk a cock like you wouldn't believe. She gets me rock hard again in a minute.
In younger days it was 2-3 times without pulling out and 5-6 times per session, though I remember going 8 times in a row at least once.
Going condom-free for the first time in 20 years has been a great enhancement to our sex lives. Total spontaneity, and no interruptions!