He likes the smell of his own farts. Deal breaker?

I’ve been dating this dude for about 3 months and 1 month ago I saw an email he wrote to a college confession page saying he likes to smell his own farts. I thought he was just trolling and ignored it but tonight, I got up to take a call and after I went to check the modem to sign my phone onto WiFi and I hear farting and then see him bend over and smell his fart a few times. I don’t think he knew I was back in the house. I went back out and waited 10 mins before coming in. Deal breaker or no?????