Well, these messages aren't viruses, but called Spams .Spams are an unwilled messages -usually Ads -, or a dating proposals as the case here. I've already received 4 :-) So funny, isn’t it?
Viruses are a small programs that have a different functions ,they runs secretly and without the will of the pc owner .The thread may differ from a simple running that makes your PC slower ,to a total crash of the OS or a Lose of DATA .
The Golden Advice is:
Never accept files but from trusted contacts, and never run a program coming from an unknown source.
BE CAREFUL, SURF SAFLY ;-)
Peace Out,