I'm single at the moment, but none of my previous GFs had a problem with my guns, knives, and watches. They actually preferred me getting watches as that were not as "dangerous" as guns and knives, despite them costing more than either. The way I look at it, until I'm engaged it's all "my" money. After I'm engaged/married, it becomes "our" money. So, my plan from day one has been to amass as many toys of all sorts as possible before "my" money becomes "our" money and I can't get any more cool stuff.
Once I'm hitched, then all my toy buying will cease, except for all forthcoming iterations of the Paystation, which will forever be in the household.