about such small things pretty consistently do think they lie about big things?

I’m just scared he’ll cheat he’ll lie whenever possible just to save himself from being in trouble I can’t stand the thought of being cheated on ... no indications but every time we fight he talks about how he’ll just go f*** someone else i always ask him why he has to lie about small things i don’t get why people feel the need to lie I’m not like that why do you feel the need to always be sneaky makes no sense to me.