Who can see the future? We may never know it
Sweets and kama sutra, swisher swisher would you blow it?

from Vic Mensa (Ft. Ab-Soul) – Holy Holy Lyrics on Rap Genius

Meaning

No one has psychic powers, so we’ll never be able to see into the future. Some kids may never even live it since the threat of death is so high.

He does know that he has weed and sex to look forward to though

This could also be somewhat of a triple entendre. Slang for smoking is blowing. Kama Sutra is basically a sex bible. A common sexual act is a blowjob, and the verb form of blowjob is to blow. Blow it can also mean ruin it, or mess it up. In the context of talking about the future “blow it” would imply ruining your future.

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