Stretch marks?

I'm about 26 weeks and I haven't had even 1 stretch mark on my stomach but my boobs are COVERED!

Are any other July mommies already covered?

I did slack on putting coconut oil on my boobs in the beginning. I'm sure it would have helped some as I believe it's helping me stomach. I know genetics can play a role, my mom only got them on her stomach and never her boobs. I've gained 10 lbs and my mom thinks my stomach is big for how far along I am but I think it's average, drs haven't said anything. My husband doesn't mind the marks it's really just me.