I'm gay, but I don't want any dicks in my ass

So in the past few months I've come to the conclusion that I'm definitely attracted mostly to guys. I've always sort of known but I never took full ownership of it (I'm 17, btw). I'm currently closeted but I plan to come out when the time is right, preferably somewhat soon. There are some things about being gay that im confused about, though... I wouldn't have any issue with getting or even giving blowjobs and I'd probably even be willing to fuck a guys ass, but I don't think I'd feel comfertable "receiving". Is this normal or common? Is internal stimulation the type of thing to get used to with experience? Are there a lot of gay guys who don't like taking it in the ass? Any advice would help, thanks