oh god i LOVE cock lol i could suck my Masters cock for hours if my mouth didnt get sore after long :P
i suggest making sure hes clean before you start cause if hes not then um yeah thats kinda gross but otherwise i dont think it is, even if he has just peed it wont kill ya
tho at first i did think it was gross but that was before i had even tried it, now i just love it and dont think about if its gross or not i do it for him and when he pushes my head forcing his cock in my month mmmmmmmmmmmm