That's good then, I felt awful thinking I had offended you.
As we started DD toileting early she'd always used a potty. I tried an insert seat when it was time to change but she hated it. She eventually revealed that her main concern was falling in (even with the insert), so initially I would stand in front of her, she'd hold my legs and I'd place my hands on her lower back so she felt no falling risk.
Try to talk to him about his specific problem with the toilet (at a time when he doesn't need to go). If it's not the falling in, it could be the water, the splash (can be solved by placing toilet paper onto the water surface first), the height, not having his feet on the floor or something else.
Oddly she was happier to use the big toilet when out than when at home - perhaps because she knew there was no other option.
Pregnant for the first-time?
Not sure where to start? We can help!
Our Insider Programs for pregnancy first-timers will lead you step-by-step through the 14 Pregnancy Must Dos!