Dear Alcove,
Pads, such as Depend or other brand of Guards, can only be used in briefs, not in shorts. They have an adhesive strip which you peel the cover off of before inserting them in your briefs. This holds them firmly in place - they cannot wander around if placed correctly. I have used guards for 14 years; my use is about 4-5 per day.
Poise pads are meant for women and are designed for their anatomy. I would suggest using guards, unless guards don't hold as much liquid as the Poise.
Another alternative to using pads is the male condom system, manufactured by firms such as Bioderm, Afex, and Liberty 3.0. You can Google them if interested. They collect urine in a reservoir on your leg.
Swanee