I had a walk around Primark and La Senza today. The results were:
1. No Y-front type pants in La Senza - boxers - YES, but no Y-front type
2. Primark - a couple of designs of Y-front type pants, but not very good designs i.e. cows, etc. They have loads of boxer short designs, but that's not what I'm looking for.
3. Lots of strange looks from the women in La Senza as I was the only man in the shop. Looks of confused looks from the assistant in Primark when I tried to explain what I was looking for. I hope she didn't think I looking for them for myself