I have visited various European beaches many times and have noticed the number of men who wear all sorts of speedos/bikinis/thongs. You see a very diverse fashion.
Being accustomed (over time) to seeing this, I have no problem wearing something even "skimpy" to the beach. I have noticed people look at me a bit differently at beach in Los Angeles, but it does not bother me at all. I just go about laying and baking in the sun.
I honestly really don't care what is going thru anyone's mind when they see me in a bikini, just go about your business and do what you feel is best and makes you feel sexier
