Are all gurlz like that?

Recently, one of my ‘friends’ gf, who was supposedly commited, was found by my friend in one MMS clip with his best friend!!! What the fuck? Why do most(thats what i have known) girls do anything to get a fukin dick in their pussies? Any girls reading, plz tell me,I BEG OF U, * how am i supposed to know if my gf will not cheat on me?*
I am thinking about a relationship, a long one, NO one night stands….
Awaiting ur comments girls,
just sixteen