Like everything there are pro's and con's... premature ejaculation is more likely as you don't need to train yourself up to last longer since you can just keep going. Most of the time your partner wont even need to notice your precum, but if you want to have a normal ~5-10 minute session you need to fake orgasm to finish up.
For me you still get a bit of a comedown after ejac but it is possible to focus and continue going, if you keep going immediately then the next cum will usually be even better although take some good action to get there.
The dic will be a bit rough the next day if you've gone at it too long OR the other downside if you've not had any for a week the dic can be so hard it stretches the skin.
Interesting subject... shame they don't want to experiment on us to make some sort of viagra like pill ...
Had it like that for years, aslong as when you leave it alone for a while and it goes away it should be fine.
During our first 10 years of married life, some nights my husband's penis very hard and stay thick and strong even after two or three long intercourse. I really enjoyed lot, longer the stronger and thicker, more I enjoy his long intercourse with lovely kissing and sucking me. Then it slowly went down to just one intercourse. After we start taking herbal medicine for our old age health, his penis started again get stronger and stronger day by day. Two weeks ago, we celebrated my birth day in island. He gave me 7 long intercourse average of 30 minutes with lots of juice. That was the best birthday gift I had after many years. His birthday is coming soon, I promised him and decided to make him happy that day and I cannot wait to enjoy his wonderful hard penis and it is golden-rod .