Best Way To End Relationship

back in college i was dating girls
i liked to fuck around, not being to serious into this relationship thing.
Whenever i was about to quit it, i would fuck them doggy, then suddenly putting it in in their ass. Most girls freaked out, which i loved.
some girls would like the ass fucking, then i would cum with my dick in their mouths.
The few girls which loved that, i would just keep on fucking them as side chicks.