[Strange question. Lightning raises an eyebrow for a few seconds, before smoothing over her expression in order to answer him with a calm face.] Sparring with someone works. So does a handshake. Any kind of prolonged contact is just fine, even if you're wearing gloves.

But most of the time I just hold my sister and that's enough for me to get by.

[She shrugs at him. For Lightning, it's much easier for her to hug her sister than it is to touch an acquaintance so casually.] My advice? Just ask someone, and they'll probably let you hold their hand for a while.