End to a long edge session, cumming on my toy

After a long edge session, 3-4hrs, the guy I was chatting with wanted me to cum on my toy and eat my cum, he is helping to train me in cum eating. I am trying to get better about eating my cum after a good edge/goon session, when I'm JO I'll suck any cock that is around and eat all the cum I leak but after I blow my load I lose all interest.