+1 with dano
there is absolutely no reason to wear anything over the tights
what's wrong with blokes these days?? do they have to worry about the possibility that someone might catch a look at the bulge in the tights or get called a girl?? well, guess what - all blokes have said bulges much like women have tits and I'm damn sure looking at the amount of flesh on show, that most women aren't worried about their tits being seen.
ffs - man up and stop worrying about it.
anyway - it's too warm for tights unless it's sub-zero so be a man and just wear shorts even if it is a bit cold.