Is this an overstepping boundarie

Hello,

My BF and I have a non-monogamous relationship. He is poly and I'd be more open relationship. Together since 3 years.

The last 1 and a half year we were fully monogamous, because of me being satisfied with this relationship and him wanting to put all his energy in our relationship and the new home we are building (moved in together and renovating our house).

Know he wants to explore his sexuality and bonding with other people again. So we talked about safer Sex and some boundaries.

Because of him thinking, he doesn't have time for a secondary partner, he just wants hook ups at concerts and festivals. We agreed on being each other primary partner and that only we have unprotected Sex (me taking the pill).

In this talk, he brought his wish of Bjs without condoms on the table. Told him I'm fine with that, but he have to get checked after that. Every time. And also I prefer to wait with unprotected intimacy, until we have a significant result.

Now he is frustrated, because in our era an STD check costs around 150€ to 300€. And you have to wait 2 too 3 weeks to get tested.

He thinks that this will damage our Sex life and limit his adventure of exploring his sexuality. Thinking he can't be spontaneous with me or other people.

I didn't thought this would be such a problem, because oral STDs is a real risk. And our health and the health of our partners should be important.

Am I to overstepping for prioritizing my/our health? I also will gladly taking check ups.