How often were you having sex when your relationship was good? Has he continued to be intimidate with you (not penetration) since then. Was it a gradual decline / erection fail over time? Or did he just stop - not even try?
He sounds like a sex addict to me.
It’s not just the amount of sex he is having (that would just be a high sex drive) but the numbers of partners and the fact that many didn’t sound single (the lying and cheating) - the risk, secrecy and chase sounds like where he found the thrill (the book to keep on track of something “out of control”?).
How often did he sleep with each of these women?
He is only telling you about his past now so that YOU will bin him - he is a coward looking for a way out.
I can’t see any medical reason relating to age to stop dead with sex at 50 from someone who has had such a high sex drive. There is also viagra.
I believe he still was (and is) having sex with multiple partners since you got pregnant. I believe he targeted you as you are young and naive and he could hide behind that.
He had a very bad accident just before meeting me where he nearly died he said this changed him and made him realise that he didnt want to just mess about anymore he wanted to find someone he could have a real relationship with that had no lies or dishonesty which wasnt long before we met
...... but he was still “seeing” other women the weekend that you met - doesn’t add up.
You don’t have to catch him (although it will all be there digitally I expect if you can be bothered to rummage - messaging on FB, insta, LinkedIn, dating / hook up apps, another phone etc).
You can just decide that you are not compatible and leave.
Because he was not transparent about his past for 2 1/2 years - until you were trapped vulnerable and pregnant.
Because he is not intimate with you.
Because he continues to give you info about women when you have asked that he doesn’t.