The normal sex life?

Normal sex life is when both partners are satisfied. Depending if you live with your GF or not, availability and work, well, depends on how many times you get together.

A few times a week is fine. I seen some research pretending that once a week is the minimum to be an happy man. More than once a week is good. but not influence satisfaction much.
for me, twice a week steady is what I need. Even then, a third time would help.

Too much sex with your partner = habituation. Habituation leads to desire for novelty (coolidge effect). Novelty desire means you get unsatisfied with the same stuff and start calling sex with your GF "vanilla"....

So, don't overdo it, try to avoid "shopping" for extra thrills on the internet, that will ruin your ability to enjoy sex with your GF in the long run.

I stopped PMO'ing and MO'ing some 290 days ago, but I watched a little p-sub last night and got caught. nothing happened, not even a boner, BUT I'm frustrated again, and wish that I could enjoy something spicier. I see my glass half-empty.

You can get only as kinky as your partner feels comfortable with, so porn's 'grass" always seems greener....