16G needle deep into my penis head

Something went wrong. Pain is the goal, not blood loss.

Actually, both are true: when stimulating the testicles and especially the highly vascularized penis, severe bleeding—as well as pain—is unavoidable and part of the sensation.

But it's not about setting a record for who can make the most blood spurt out of their penis for the longest time. Twenty or thirty seconds is fine; after that, you should start stopping the bleeding.

perfect !!!