To be concerned

[ViaBlue]

My 23 niece (who lives with us at the moment) has a new boyfriend.He is nice, intelligent, interesting and a good company. She is very much in love and he treats her well.

He has been to ours several times and is absolutely brilliant with my DS(7). He engages with him frequently, talks to him about all sorts, plays wrestling with him..
If we are in adult company and DS is doing something seperatly he will go and join him...He has been really interested in DS from the first meeting and initially I thought it was amazing that he likes children and is so good with them..
DS adores him...

I'm feeling really guilty about it but I'm now feeling concerened! He seems to be almost too interested in DS and way too tactile (it's wrestling/lifting/throwing around kind of way)..I have never met a bloke who likes children so much..
AIBU and sexist?

Does he have younger siblings or cousins? That could explain it, if he’s very used to being with & playing with younger kids I mean.

Hmmm. Trust your gut. Not massively helpful I know, but keep a very close eye. It’s probably nothing but sometimes our intuition speaks to us. Horrible feeling though OP, sympathy.

No harm in being aware. Don't let them be unsupervised.

Could he be ‘showing’ your niece how he’s good with children, but being over the top about it?

Something is making you feel uncomfortable so I'd say keep a close eye and no unsupervised contact.
As a parent always trust your gut instinct