def positive_pairs(l, k=None):
    result = []
    for i in range(len(l)):
        if len(result) == k:
            break
        if l[i] > 0:
            for j in range(i+1, len(l)):
                if len(result) == k:
                    break
                if l[j] > 0:
                    result.append((l[i], l[j]))
    return result