Sexual expression of the soul

This is difficult to answer since you can divide each of those categories further. For example number 3 - sex with a stranger is an entirely different experience than sex with your lifelong committed spouse. Or number 1, you can be a bitter loner or a holy ascetic.

 

Love is an expression of the soul. Sex is an expression of the body.

Love is a connection of personalities.
Sex is a connection of bodies.

A connection of personalities and bodies is love making.

A connection of bodies but not personalities is sex.

Sex without love is like a body without a soul.

It's a rehearsal for death.

Hence why none of the relationships these days last and why divorce is on the rise. Our society has made the connection of bodies the primary focus instead of the connection of personalities.