Urban Dictionary defines put out as the dispensation of sexual favors. Of course, that definition has nothing to do with this totally innocent retro-style design for back yard birders who enjoy putting out food for the birds.
The I Put Out For Birds graphic here features two young children placing seed out for friendly birds. Some birds fly up to the feeding platform, while one waits patiently on a stump while the little boy hands a treat to a squirrel.
This fun vintage graphic is paired with text written in an old-timey font. The text reads I PUT OUT FOR BIRDS, which, again, refers only to the putting out of food for the actual birds. No other putting out is going on here whatsoever.