Oral sex
From wipipedia.org
Oral sex and giving head are each colloquial terms for all forms of sex to include all mouth-oriented versions of sex, to include fellatio, cunnilingus and anilingus.
Oral sex can be something 'given' by one person with their mouth to another, or something 'done' by one person to another's mouth, or a combination. Where a man is using a woman's mouth with little immediate reference to her, this is often termed 'mouth fucking' or 'face fucking'.
Truth to be told, the usual consents is that male homosexuals are into oral sex], which would suggest the minority are into anal sex.
