op, i assume you are aware of pot odds? as others have said this is a simple fold, but just for fun here's the way i work it out when i'm not playing
[(chance to win)*(total pot)] - (cost of action) = expected value
[x($37)] - $15 = ?
we want to make a profitable call, so we want to make more than $0 on the call.
x($37) - $15 = 0
37x = 15
x = 15/37 = 40%
there are simpler ways to do this at the table, but we'll leave that for now.
so it depends what you mean by being behind.
if he has 62 you have odds to call:
http://www.propokertools.com/simulator/s...amp;h4=&h5=
obviously he's a lot stronger than that and our pair outs are most likely not good:
http://www.propokertools.com/simulator/s...amp;h4=&h5=
try plugging in a sensible range for villain into the tool and see what equity your hand has against his range. you'll probably come out with 30-35% equity, so this is a fold, but it's actually a little closer than i expected.