i thought obesity could lead to problems getting an erection ? personally i have found it more likely to lead to problem's finding
skinny (but stong) men seem to do the best and have versatility.Body builders ? forget it , in my experience and from heresay they are sometimes compensating for a lack of something with all that body building , taking 'roids which has an effect on performance or love themselves so much they have little ability to love an appreciate a lover.
lasting longer probably has a lot more to do with the health , experience and confidence of the man .And love making has more to do with length of penetration (recovery time to perforn again , other forms of lovemaking etc. )