Is there any logical explanation for how the phrase making out came together?
I know that it has sexual implications (at least kissing, with the intent go further), I just can't imagine its ancestry.
Make out has been used with a sexual meaning since 1939.
The third edition of the NOAD reports the meaning of make out is, informally, "engage in sexual activity", "make progress", and "fare".
According to Merriam-webster Under the 24th article for the word "Make" it states: 《24 : to persuade to consent to sexual intercourse : SEDUCE》 And like most of the explanations agree it usually refers to preteens and teenagers, And that type of behavior was typically done while away from home or "Out" Maybe "out" on a date . When put together you have "Make-Out"