Why doesn't my boyfriend cum from oral sex?

okay my boyfriend is almost 17 and I had never given head before I met him. My first time he said I was a natural but he didn't cum. and I've given him head atleast 20 times after that now. HE STILL HASNT CUM! I brought it to his attention last weekend...

because I was down there for 40 minutes and I even tried to see if I could finish him off with my hand. and then he told me I could stop and that it was fine. and I was like damnnn you last a longgg time! and hes like I know but its only when im with you that I can last that long. so I was like alright am I doing something wrong and hes like HELL NO your fuking amazing at it. so im said...alright how long does it take you to finish? and he sed anywhere from 5 - 25 minutes depending on how long I want it to take. and so I don't know why he hasnt cum yet but I think its absolutely impossible to make this boy cum unless we have sex haha, but we dont do that often at all. and im trying new techniques and trying to go longer and changing my pace, using a little teeth occasionally and I don't know...I have nooo idea why HE WONT CUM! He seems like hes sooo close and then im waiting and waiting and then minutes go by and I don't know he just doesnt. haha someone please help me because im running out of ideas!

remember to pay loads of attention to the head but obv not all of your attention. also have you tried like rilly gently strokin his balls or massagin them and also going up and down the bit of shaft you cnt get down your throat? also remember to change pressures but get a good rythmn going ummm well thats all I can fink of you 2 try and I hope it works! goog luck hunni!

40 minutes? Damnnnnnnnn.

I know where you are coming from. I have dated a guy like that before. They have learned to hold it in. So maybe he knows how to keep from cumin and he holds it because it dont want the moment to end and it feels really good. My ex did that and I asked him if I was bad and he was like hell no your not your the best ive had I just don't want you to quit but after a while for myself it got kinda tiring. Why don't you talk to him about it and say well you know next time why don't you cum so I can taste you or so I can have it all over me or what ever you would want to do and see if he will. Ask him if you so great then why wont he cum.

WOW ! That is strange / I love my an Bill / and I love to give head / At the last second before he spurts / I pull back my head and CATCH his lovely cream in the FRONT of my mouth / so that I can play / with the cream- taste-scent-feel-sensation ! You have to find out why your guy is is dry you deserve some CREAM Also why not put some of your FUN on cam and youtube so we can be there with you all Eeee