snow I would, and indeed did, think 'great - my boyfriend is totally cool with condoms which means I don't have to fill my body with artificial hormones or undergo invasive medical procedures, and we won't get pregnant'.
We discussed contraception as a couple early on and agreed what would work for us both.
I was so happy that he was taking his part in contraception, amongst other considerate and mature behaviours, that i married him and we continued to use condoms until we together decided to TTC, and we now have two planned sons and are trying for a third child.
My DH has always been careful about contraception in earlier relationships, as have I always insisted on condoms with my previous partners (taking the MAP twice when I wasn't sure it hadn't split) and oddly I've never been pregnant without wanting to be and he has never got a woman pregnant before me. Neither of us has had an STI either.
He made it clear he didn't want a baby before he was in a long term relationship/married, took responsibility for his part in contraception every time he had sex, and got his wish.
His care over contraception didn't cost him any relationships, didn't have any negative physical or emotional consequences for him or his partners (as far as he knows) and on the contrary has always as far as he tells me been well received by his partners.
Ultimately, if a man really doesn't want to get his partner pregnant he has options: no PIV sex, or use a condom. If a man does not either abstain or use a condom, he is consenting to the risk his partner gets pregnant as even if she's on the pill if she has been ill or missed a dose or taken it late, it may still be possible for her to conceive.
Women can't get themselves pregnant, it always takes two. If a man is casual about pregnancy risks he has no one to blame but himself.