Several will do it, but sometimes it can be awkward asking unless you know it's available...

This is practically a trademark of Tuzdae's.

Two hints with her:  First, she's VERY comfortable with it so don't be shy--she'll probably offer anyway, but if you want to try it, come right out and ask in advance.  Second, she's very much the understanding type--if you're curious but also embarrassed or emotionally uncomfortable about it, tell her that too and she'll put you completely at ease.