Do you think it’s odd?

Is it odd if you find out your partner only uses private browsing?

(Back story) I was booking flights to go see my bf and when I asked him to send ss of some of the flights he found I noticed he was in private browsing. My opinion is that people only use private browsing for suspicious activities. I asked him why he was in it and he said he always uses it and doesn’t want people to know what he’s doing. Lining what he said up with some of his worldly opinions ig it’s not too weird.