As others have suggested, bike fit, padded shorts, anatomical saddle, etc.
When it comes to bike fit, consider the tilt of the saddle: try tilting the nose of the saddle down. If it's above level, or even level, you'll exacerbate nerve compression with the small surface area of the nose. Don't tilt it too far down or as you slip forward you'll constantly be pushing yourself backward on the saddle. Further, examine the position of the saddle relative to the BB. If the saddle is too far back, you'll be sitting on the nose - try moving the saddle forward such that your bum is resting on the wider section of the saddle. Note that saddle position and tilt can affect the saddle height. So write down your saddle height before messing around and readjust afterward if necessary.
Also consider your body position. Are you resting your upper body on your handle bars, or are you supporting it with your core? This will affect hip rotation. The former causes you to roll your hips forward putting more pressure on your perineum. The latter will rotate your hips back relieving pressure on your perineum and resting more on your ischium (I think that's the bone you'd be sitting on.) You can work on your position by keeping your elbows rotated down, relieving weight from your hands, making a conscious effort to use your core, and a conscious effort to feel the effect of hips rotated forward and backward (as far as I can tell, rotating your hips back is done more with your lower abs, similar to thrusting your pelvis forward.)
All this considered, I still get numbness. I compete, I ride a bazillion km/year, I've got padded shorts and an anatomical saddle. Whatever. Likely because I don't support my upper body with my core and roll my hips forward. It's an aggressive position that I like, so I mitigate the issue by occasionally standing - if I'm on flats I switch to a high gear and turn over a low cadence, or I'll just rest my thigh on my saddle and coast (I do this a lot riding in traffic approaching red lights and stop signs.)