Does wearing a speedo make a guy gay?

If a guy has the body I'd say go for it!

No! I am 33 years old, with a muscular (not musclebound) body and I wear a speedo. I have nice body and I work hard to keep it that way and I like to show it off. Wearing a speedo has NOTHING to with whether a guy is gay or straight. I know guys who are gay and straight who were a speedo and I know guys who are gay and straight who wear boardshorts.