My boyfriend wants to give me oral??

My boyfriend and I have been dating for a year and we have sex three times a week and I always orgasm. But he said he wants to give me oral... I'm not sure if I do because I'm so used to having his penis in my vagina, not his tongue. I never give him a blowjob because a lot of girls say semen tastes gross. He fingers me sometimes and he said I smell great and have nothing wrong with me down there. I'm just not sure if I want to have oral... Please help? We are 16 btw