Definitions
Definitions are the meanings of words.
What is abstinence?

The word abstinence means the act or practice of restraining
oneself from indulging in something. The word can be used to
refer to restraining oneself concerning:
drugs
alcohol
overeating
sexual behaviors
sexual intercourse
Abstinence is a type of birth control method that you can be
sure works 100% of the time. Abstinence is also not having sexual
intercourse. Is only 100% of the effective of the birth control
methods.
What does fresh mouth mean?

It can be two things. One is the minty clean feeling after
brushing your teeth. The other is when someone is being 'overly
familiar' with someone they should be respectful towards. This
would be like asking your principal, "Hey Mike, how's the old
lady?" instead of "Mr. Johnson, is your wife feeling any
better?"
What does it mean to speak in tongues?

Speaking in tongues is supposedly evidence of the Holy Spirit,
since no human can really understand what is being said.
The apostle Paul was dismissive of those who claimed to speak in
tongues, although he was not prepared to alienate those who claimed
this ability. He indicated a preference for prophecy, since this at
least might be useful. In 1 Corinthians 14:4, Paul says "Whoever
speaks in a tongue builds himself up, but whoever prophesies builds
up the church." He then goes on to explain what he sees as the
futility of speaking in tongues, summarising this in verse 19:
"but in the church I would rather speak five words with my mind,
so as to instruct others also, than ten thousand words in a
tongue."