They want to. Helps them feel secure and safe in their own room, can help transition them from the parents bed to their beds, they may sleep more soundly with someone else in bed with them, there is limited space in the family home for numerous beds or bedding arrangements....... How long is a piece of string?

Yup, what she said. Mostly in our case because they want to. They've both loved co-sleepin with DH and I. Admittedly, more than I love it. I love the cuddles but have huge difficulties actually sleeping with anyone touching me. It would also make life a fair bit easier if it works for them as it's about to get a whole lot squishier with #3's arrival.

Vic, that's so cute about DS coming in for a cuddle! That's the other untested aspect of this scenario too... what DS will get up to if he wakes up and wanders at night as he's usually in a cot.