Then you actually watch TOS and start to wonder where did people get the idea wrt. Kirk from. He wasn't anywhere near the womanizer people accuse him of being - this seems to be one of those commonly widespread misconceptions about the show, up there with "beam me up, Scotty" (never actually said on the show), or "redshirts" being the ones to always die (someone did the math of casualties by uniform color, and red wasn't first).
If you want to find a womanizer in Star Trek, try commander Riker from TNG.
Kirk wasn't a womanizer - it's just that all of the women liked him.
Some of it does seem odd to a modern audience though, such as the episode where he gets flirty with a girl hitting puberty in "Miri." The odd part was he was taken aback when the others told him that she liked him.
If you want to find a womanizer in Star Trek, try commander Riker from TNG.