What the hell does ":3" represent?

[sergiodaly]

TruckOSaurus said:

sergiodaly said:
is it me or that is more like tits than cat face? maybe i am just a pervert!

No, no, no, no, no for tits the dots need to be on the other end:

3:

ohhh.... makes more sense...
damn curse that was cast on me since i was little... tits are always in my mind... 3: 3: 3: ummmm arghhhh....