Ugh it seems that we have the same desire, I would like someone to be the donor of his cum so that he ejaculates through my cock and I expel it as if I were ejaculating his cum.
I have not done it with another guy because I have not had the opportunity, but I have done it with my own cum, injecting it again after the refractory period and I ejaculate both cum at the same time again and I feel a spectacular chill.