Stretch question.

Okay.. So when I stretch sometimes I grab a little far back and it seems to grab some skin around the base of my penis and pulls out with the stretch. This feels like a good stretch but I can’t tell if it’s just the skin, I guess my question is; should I grab up a little further and just stretch the shaft or is it still okay if some of the pelvic skin goes with it?

Also, how can I get a decent grip? It seems like I have to grab the head somewhat to avoid slipping

Put some blood in the glans and grab tightly just behind the glans. This is the ideal way to stretch without losing grip.

I often have trouble distinguishing between the feeling of my dick getting stretched and the skin getting stretched.