In most cases after a guy cum his desire is gone.
I'm amazed about so many videos then the bottom cums and the top (tops) cum in his mouth after. Obviously most guys in porno are extremely hot and that makes thing easier. 😂
I remember the scandal when BelAmi boys started swallowing cum, after that Corbin Fisher and Sean Cody follow, Men.com, etc. Now many studios would only hire a bottom if he wants to swallow cum after getting fucked and cumming.