You really don't care about cock, the only one you think about is your own. But you're told to suck cock, so you have to get used to it until you are fully in it, this way you're able to do it when told to! Practicing on a dildo will help you. You will start off slow and work your way up, using bigger and bigger dildoes, taking it in your mouth even further, deeper. It will get easier, but you have to get used to it first.

You really don't care about cock, the only one you think about is your own. But you're told to suck cock, so you have to get used to it until you are fully in it, this way you're able to do it when told to! Practicing on a dildo will help you. You will start off slow and work your way up, using bigger and bigger dildoes, taking it in your mouth even further, deeper. It will get easier, but you have to get used to it first.