There has never been a young woman or girl who does not understand this song is both "fun" and very predatory. It is neither good or evil, it's meant to be a clever critique at 50's ideas about dating.

the two people could be very in love, but they are also making fun of "making a pass" tropes of their time. We are in on the joke, because her concerns about Dad, brother, etc. being judged by aunt, neighbors, her concerns about herself, and so on, are dismissed by him repeatedly, with jokes.

About the drink: NO.

Seeing a pour tells nothing to a girl, or even some women, about "what's in this drink?" There are millions of girls now, (today is Tuesday) who are give alcohol or other drugs and have no clue about its strength, or his intent...

Most will not be raped, but some will.