I bought another two pairs of undies today and it's really beginning to pee me off because I keep buying a couple here, a couple there.

I want to buy about 15 pairs in one go and throw out all my old ones.

But you know what it's like, you can't really try them on so you think, "oh, I'll just buy a couple that look alright, make sure they fit OK, see if they're comfy and buy some more if they're OK."

But then it might be weeks before you go back and then they might have run out of your size or the colour you wanted and the undie buying bonanza actually takes the entire year.

So what do you do? Do you buy a few here and there or buy in bulk?