Make it three... and a half.
Before you ask, that half was a forced disaster.
The ones I renember is because of the non sexual related frienship that came behind, even for the two of them coming from the "lets try what this human sex thing is all about".
Remaining one, a missing fellow zoo, also curious about humans. As we did things together, so some intimity between us happened even if quite low profile, as none of us got really going when it was us humans alone.
2 women 1 guy. I'm terrified of catching something so I've turned down a whole hell of a lot of humans and no longer interested in guys. Now dogs and horses are a different story. I lost count.