Epoxy is the only thing for that.
Epoxy would be best for that.
White glue will work for that.
for best results put glue on both objects
school glue
The best is Weld On 711 when used with purple primer.
Sticky gue
It depends what you are gluing - that is why there are so many different adhesives.
Contact cement works well for that.
Epoxy is best for gluing glass to wood.
If gluing paper to paper, white glue is best.
In my opinion Camco brass propane tee is best reviewed in terms of safety.
A carrot is NOT safe. The rough edges will hurt. A cucumber would be better. However, I would think best advice is go small, and skin the tip, for a better lubricant