Hitting tortoises?

by Jacob
(Portland, Oregon)

My tortoises which I am pretty sure are both of the same gender keep coming up to eachother, hit them by swinging their shelf like a battering ram, then they climb on top of eachother and opens their mouth. It look like they are mating because its all the things that they on the internet. Except there in no *cough* *cough* "conection". Haha. Its been long enough where if they were different genders they would have had eggs by now? Help would be great! Thanks, JB