Plants take their nutrients (mostly) from the soil. No need to move. As for propagation of the species, you can hardly beat a million "seeds" thrown into the wind for travel! Heck, the plants even get the "birds and the bees" to help with the sex thing!
Why is there sex? Very energy ineffecient, and there's others ways of mixing DNA type stuff.
The sex drive is unknown to you?
And on the other side of that coin: Why are some living things still sexless. Why haven't sexual forms in that niche predominated?
That's evolution. Everything finds its place! Duh ...
It seems like just yesterday I was being lectured by a creationist on bacterial conjugation.
Are there, in fact, any living things that have never exchanged or received genetic material?
There is ALWAYS an "E" solution, isn't there!?