depends.
Lets say your g/f likes to dance, those partner dances, guy &
gal together wans, and are involved in competitions.
Competitors in these categories are often then not, under intense
stress and pressure to perform well.
And these emotional times, will spark off emotional attachments to
their partners.
Can you, in your heart, tolerate your g/f being closer to another
male other then yourself?
Not to mention her in other men's arms. His hands all around her,
holding her close like a lover