Your mind almost stopped working there. Stallions only lasted that long? You remembered seeing a video or two of horses having sex back on Earth... you know, for academic purposes, and remembered that they really didn't take very long. So here, even on a bad day where you gave in too quickly, you were likely to last at least five times longer than essentially any other male. You were like a sex god here. You could feel your ego swelling, and so could Chrysalis apparently by the way she cooed from the rush of blood going to your dick.