Both Uses of

piquant
in
Ulysses, by James Joyce

she said with a pert toss of her head and a piquant tilt of her nose.†
Chpt 13 *

My dear Kitty told me today that she would dance in a deluge before ever she would starve in such an ark of salvation for, as she reminded me (blushing piquantly and whispering in my ear though there was none to snap her words but giddy butterflies), dame Nature, by the divine blessing, has implanted it in our hearts and it has become a household word that il y a deux choses for which the innocence of our original garb, in other circumstances a breach of the proprieties, is the fittest, nay, the only garment.†
Chpt 14

Definition:

having an agreeably pungent or spicy taste

or:

engagingly stimulating or provocative