Responses
Another way to interpret it is that "Just because I'm considering it doesn't mean you should, too" basically it's like a person wanting to try baseball and then his friend thinks, "hmm, why not?" And tries it himself. Since this is not something very favorable, he's probably saying that he didn't have to try that himself.
When nishimura caught them having sex and he was like 'you don't have to try it just cos i said i can probably do it with guys', i was like..oh honey, that ego needs to come down several notches. They've been having sex for years and years stfu