Often people in DDLG and even in vanilla relationships over think what kinks can be included in their relationships because it may or may not be outside of their certain dynamic. Everyone has different kinks and you should certainly explore them with your partner as long as it does not cross any 'hard limits' that either of you may have. While it may not be the norm it is all subjective and is dependent upon the dynamic between you and your partner or partners.
As everyone stated above I agree that it can be and there are really no limits or kinks that cannot be included in it.
