What does it mean when your older sister's boyfriend always stares at you?

caniaskyousomething
What does it mean when your sister's boyfriend always stares at you?

This is really strange, but whenever my older sister brings her boyfriend (even the previous ones) over he always stares at me. It happens all the time and I find it strange... Shouldn't he be staring at her? He doesn't stare at my other older sister, (I have two) just me.

Any ideas why?
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+1 y
The boyfriend is 3-5 years older than me.
What does it mean when your older sister's boyfriend always stares at you?
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