Oral to completion (OTC) involves stimulating a partner orally, whether via fellatio or cunnilingus and continuing the stimulation until the recipient reaches orgasm.
More About Oral to Completion
Often, oral sex is treated as a precursor to intercourse. Giving oral to completion can make it into more of the main event.
Orally stimulating a partner to orgasm, or being orally stimulated to orgasm, can be intimidating for some people due to the extreme intimacy of the act and should be negotiated between partners.
