My on/off partner of 15 years said he can only cum/orgasm with me
Basically I was his first, we had one break up back in 2007 where he went wild and shagged anything he could 
He said he never came with these girls, one girl he was seeing for two months, another three. I believed him as I couldn't understand why he'd say it or go on about it n just thought maybe he was shy with them
Then, we had another serious break up in 2015 where he again slept with lots of women but fell in "love" with one particular one who he extremely liked. Again, when we got back together he said he still didn't cum or climax with any of them. I was a bit dubious this time as I knew he actually liked two of the women he dated particularly with this one he said he was in love with so I didn't get it st all.
Then I found a txt of a women he'd been with the longest ever apart from me (6 months) who said he'd got her pregnant!!! I was in shock as he still convinced me he wasn't climaxing with any other women ?!?!?!
I can't understand why he'd lie or emphasise it so much
So I'm just wondering does this sound normal? Can this happen where a man can only climax with one particular woman? I can understand if it's someone he wasn't really attracted to or liked but st least three of the women he liked!! Or really liked!!!
It just baffles n annoys me why he would say this and would it have been possible for this woman to get pregnant without him climaxing???