Small penises and erection time span

Is this normal for guys with small dicks to have very limited erections? It seems like well endowed men can stay hard for much much longer? thought?

Age has more to do with it really. Have you read my cuckold books about such small cocks?

4.5" penis always had a short erection time span. Intercourse it would only last maybe 15-20 minutes of very gental fucking, once thrusting starts ejaculation soon to follow. Now if given the opportunity to fuck its 4-5 pumps then its ejaculation time. If I masterbate its a little better but if I stop and give penis no stimulation erection is gone in about 30 seconds.
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im about the same
submissively
sissyjilly