Effect of Oral Sex on Throat?

Q - Is it harmful if a guy shoves his cock all the way in your throat?

A - Harmful in that it may hurt your throat if he is rough, but I know of no evidence that having a cock thrusting in your throat, even on a regular basis, causes any harm. After all, that is one of the preferred forms of sex between two men.

Q - Will it stretch your throat or make your neck thicker so people might know you suck cock?

A - No. To believe that would be to suspect very muscular men with strong, thick necks of being cocksuckers.