As a guy who has sex with guys, its not so much a switch to contraception as a decision of whether to keep using condoms in a relationship. In terms of HIV prevention, I learnt about a method of discussing it called the 4 T’s:
1. Test – an initial test to confirm you’re both HIV negative (and free of any other STIs too, of course)
2. Talk – talk to your partner about not wanting to use condoms, your ideas about monogamy and what you expect from your relationship, and make sure you’re both on the same page.
3. Test Again – after the three month window period for HIV to make absolutely sure you are both HIV negative
4. Trust – trust your partner and the agreement you’ve made, and that if they break your agreement they can tell you and you can go back to using condoms if necessary.
I feel like the HIV prevention is pressed upon gay guys and men who have sex with men more than the general population, but I feel like the 4 T’s are a pretty good outline for anyone who wants to be committed with a monogamous partner and have sex without using condoms. But there’s also PrEP for preventing HIV, which a lot of people referred to as “the pill for HIV”, so if people are taking that then I guess it’s just a matter of eliminating other STIs before choosing to not use condoms.