1.
Male Pelecanimimus dinos apparently liked to hitch a ride on females during sex.
2.
Careful where you point those horns, Pentaceratops.
3.
Tyrannosaurus rex might have had a bit of a nuzzle before getting down to it.
4.
Their tiny arms apparently didn't pose a problem.
5.
Sauroposeidon might have done it in the water.
6.
Bonus: T. rex skeleton casts in a mating position, looking at a picture of two T. rex having sex.