Why would my husband get this on his phone?

I don’t receive messages like this on my phone. I get messages about buying homes, winning stuff, Victoria Secrets, stuff like that I have signed up for or added my phone number to. I went to it off of my phone and tried to log in with his number and tried it with email. No record of anything showed up. I know before we got married, a few yrs ago a message came through from a dating site at 3am which he admitted to that he used to be on before we even met. He let me deactivate that. I have caught porn on his phone while I was looking up some when mine was dead like two yrs ago. I personally don’t like it, I don’t care about negative comments so keep them to your self. I’m just curious of why he got something like this. This is a new phone and number he’s had for a yr now. He claims he doesn’t know why he’s getting stuff like this. It was a messed up situation about the whole porn thing, that time I was going through a miscarriage... Not exactly something I want to find on his phone then when I had to google something.