Respecting Female Teammates, Technical BJJ for Big Boys & Is Stretching Pointless?

How do you approach rolling with women as a BJJ guy? What is the right way to go about making friends with team mates of the opposite sex? How to keep it respectful and be a good training partner so everyone has a good time on the mat.
If you are the biggest person at your academy how do you prepare for Jiu-Jitsu competition if you only have smaller training partners - do you need to seek out larger training partners from another gym?
"Stretching is pointless" (for Jiu-Jitsu)- Josh Saunders. Is this a relevant statement for the everyday BJJ practitioner or is it just another soundbite? The importance of stretching for BJJ longevity is clear but if you are focused on winning comps and going out in a blaze of glory- is it just a waste of time? Let us know your what you think...