Different cultures have different patterns of gift giving. Juan Martin Espinosa observes that Mexicans enjoy giving gifts, including the initial smiles that you will receive. Notice that he does suggest that those who receive gifts generally put them aside and open them later in private, sending a thank you note as a follow-up, possibly along with another gift. A return gift may not be expected, but an expression of gratitude is. Gifts are appropriate when invited to someone's home, but as Luz Espinosa de Magdits explains, within a work context it is more for someone when they are leaving for some place else. All of the respondents discussed social gift giving and not the issue of gifts that may be interpreted as bribes, which would be a separate topic all together.