Aiya this is a simple case of too much fluid for too little space at the tip so it creates the back pressure... there are ways to solve this problem

remember when you blow a balloon... a new balloon is always very tight and you have to blow until your face turn blue before it will inflate?? that is the same problem here that is why you are getting back pressure which is how people get blue balls just like the blue face!

So there are 2 solutions not counting the 3rd
1) each time you ejac, use all the muscles and force possible to make it a big strong blow just like blowing a new balloon so that the pressure is enough to inflate the tip!
2) But if your ejac is still weak then stretch the tip... again just like new balloons you would stretch the balloon to make it easier to blow otherwise its very tight... that is what happens with condoms too.. the tip is very tight and it should be since its new and just came out of the factory! So since your ejac not strong enough to inflate the tip as discussed above so before you use each time, always pull the tip and stretch it out as long as you can pull it many many times. that way even weak ejac will still be able to fill out the tip without having to exert super amout of force to blow it out!
Of cos there is one other method... you know how a inflated balloon is always easier to blow than a brand new one... try using a used condom... the tip would have been inflated through previous ejacs already so it should be quite easy to fill it out.

Thus solves your blue balls problem!
