The feeling is great.You have to try it otherwise you'll never understand how it feels no matter how well someone can describe it.
A cock in your mouth feels warm and soft at first (unless she's hard already) and then as it gets harder you can really appreciate it.
It really fills your mouth (especially if it's a large one) and if she starts deep throating you just want her to do it harder no matter the gagging...
It's a great feeling,just go for it.When she starts moaning and grabbing your head as you blow her you feel awesome.