how long do you blow if the cock doesn't cum?

[bjbud4u]

Actually I'm kinda conflicted on this subject. I will gladly continue my efforts (preferably handsfree) until I get the feeling that the dicks owner either can't deliver - or - has given up or changed his mind for whatever reason. At an arcade - he might just wanna explore and try out dif g-holes if the place is busy (so don't take it personally). An attentive cocksucker can tell. There's nothing like the chemistry of a cocksucker and sperm donor working diligently toward the same outcum.