Yes you do. Winstrol and anavar do not aromatize into estrogen but testosterone does.
A good AI dosage for your cycle is aromasin at 10mg EOD. Start it on day 1 of your cycle and run it throughout your entire cycle and PCT.
An AI will only benefit you. It will keep estrogen levels in the low-normal range. Estrogen is the primary female sex hormone. It's something you certainly don't want high levels of as a man.
You can order aromasin from ag-guys.com if you need a source.