NO RUDE COMMENTS

Okay so me and my boyfriend were playing around and He asked if I could suck his dick . . I mean I never had sucked or nothing at all (virgin) well while I was doing it he was saying to swallow everything ! Alot of spit yuckk!!! But anyways let's say he would of cum in my mouth could I be pregnant? Is there any chance to being pregnant? ( no rude comments please im a virgin I never had been in this situation ) . . .