Is it normal that my friend loves when i fart

About a week ago I slept over my friends house and we were playing Halo 4. Everything was fine until he farts. We both looked at each other and just laughed. Then I farted back just to get another laugh out of it. Then I thought what the hell, so I started farting (I can fart on command). It was so funny at the time until like 10 minutes after the whole fiasco he asked to keep farting. Then I asked him why then he said I love it when you fart alot. So I let it go just thinking hey were both guys its normal to like farts. So later in the night he started to ask me all these stupid questions about me learning how to fart whenever I wanted to, and I gave him the answer it just happened one day. Then right after that he asked if I would fart on his face and without hesitation I said what the hell is wrong with you? Then we had an awkward silence for like 15 minutes. Then I asked that him why he asked that and he told me it turns him on and the only thing I could think of was he has a fart fetish. So now I don't even look at him the same way. Is it normal that he likes when I fart on purpose?