Need some outside opinions

So my now husband has his gallery in his phone full of past stuff and I mean that in its whole doesn’t necessarily bother me except when it’s of women he was talking to before we were together. When we got together he told me it had been about 2 years since he had been physically intimate with anyone and I believed him he put all his time into working and his daughter who he raised alone. But I was curious and was just looking through his gallery at photos and came across screenshots of past conversations of him with other women from dates leading up to us meeting so he claims now that sex isn’t a big deal to him and his sex drive isn’t all there all the time okay so that’s not a huge deal. He is 12 years older than me he is 40 I’m 28 so obviously I wouldn’t doubt him having moments of not desiring sex I mean I guess. Leading up to us meeting he was prowling after females I mean hard core and he was rather sexually driven and I mean the amount of sexting that was taking place was something I’ve never even experienced with my husband he talked different and just seems like a totally different person then who I know right now. I don’t understand how can a sex drive be there and him want to chase women like that and then meet me and things change? Is it a lack of connection I mean we are great we talk great we have legit no issues!! Just the sex will be rare and I don’t nag him about it because I don’t want to make him feel any type of way but he never chased me like that and he also never compliments me the way he did other women I mean is it just me or does it seem off? I feel like something just isn’t adding up I’m not vain so I know I’m not the sexiest woman in the world but I’m not ugly either and I just need an outside opinion the whole sex drive just up and gone but only started when he got with me does that seem iffy to anyone else? He claims he didn’t know this stuff was in his phone but tbh I don’t believe that this man has said he has no sex drive but I caught porn being watched a few times and it makes me feel like he just isn’t into me…..