Scott would hear Paige trying to make fun of him. She was trying to get under his skin but that wasn't going to work, nothing she could say could really bother him and he wanted her to know that so he was going to just laugh it off anf just show her that she wasn't bothering him at all.
"Well pixie ears, I'm not really from around here so I don't really need a secret identity. The whole point of a secret identity is to protect all your loved ones from any villains who might go after them, and with me not being from around here it means I've got no loved ones around here for any villains to go after. The costume is mainly so that I'd be able to go around in public without getting mobbed all the time. So I can just be a regular guy when I want to be. Hang out with friends, go on dates with girls, all that kind of stuff."
He knew that with the mask on no one could find out who he was so he could just do normal things when he wanted to and wouldn't have to worry about anyone stopping him in the streets and stuff so for now, while he still wore his costume, no one would know who he really way. All they knew was him name, and it wasn't the most unique name so he was sure there were more people in the city with the same name