By XF 2.2.2 default, the 2nd reaction icon looks like a pervert.
This is what did by VI-Control forum. One single heart sign is enough and won't confuse people.
At least not adjustable by members in the XF official forum.
Sometimes when I want to express "thanks", I found that none of those 6 default icons are appliable.
That’s unfortunate but I think the issue may be more with how you perceive them rather than how anyone else perceives them and that’s not really a compelling reason to change the software for everyone else.