Alessandra Ambrosio Suck On You Is That a Hickey On Your Neck?

2/14/2014 4:15 AM PST

Love sucks -- at least for supermodel Alessandra Ambrosio, who stepped out in L.A. Thursday with what appears to be a GIANT HICKEY on her neck.

Alessandra was with her millionaire businessman fiance Jamie Mazur at the time, so it makes sense. Especially since today is Valentine's Day (sorry for the reminder).

Of course, the "hickey" could always be a curling iron burn ... but let's be real: it's never a curling iron burn.