He is so serious to the point where he imposed a ban on the sexual act.
In addition, Museveni has also blamed 'outsiders' for trying to convince Ugandans to perform oral sex on one another - and said he was issuing a public 'warning' about it.
He told press: "Let me take this opportunity to warn our people publicly about the wrong practices indulged in and promoted by some of the outsiders.
"The mouth is for eating" Uganda's president warns against oral sex, adding, "We know the address of sex, we know where sex is."
Museveni signed the Anti-Homosexuality Act in 2014, making it illegal to be gay in Uganda. Ugandans risk life imprisonment if they are found to be having regular gay sex.
In 2014, after introducing the law, Museveni said oral sex could cause worms.
"One of them is what they call oral sex. The mouth is for eating, not for sex."
Check out the video of Museveni sounding off the stern warning
Meanwhile in Uganda, citizens are reminded that "The mouth is for eating" -President Museveni.
— thetouchguy (@anetouch)