Small refactor of MultiplePregnancy birth code

1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs

@@ -1013,7 +1013,7 @@ namespace RJW_Menstruation
             float leakfactor = 1.0f;
             float totalleak = 0f;
             float cumd = TotalCumPercent;
-            List<string> filthlabels = new List<string>();
+            List<string> filthlabels = new List<string>(cums.Count);
             BeforeCumOut(out Absorber absorber);
             if (cums.NullOrEmpty()) return;
             if (TotalCum > Props.maxCumCapacity * Pawn.BodySize) leakfactor = Math.Min(1 + (TotalCum - Props.maxCumCapacity * Pawn.BodySize) / 10, 2f);
@@ -1045,10 +1045,10 @@ namespace RJW_Menstruation
         {
             if (cums.NullOrEmpty()) return 0;
             float totalleak = 0;
-            List<string> filthlabels = new List<string>();
+            List<string> filthlabels = new List<string>(cums.Count);
             float outcum = 0;
             float cumd = TotalCumPercent;
-            HashSet<Cum> removecums = new HashSet<Cum>();
+            HashSet<Cum> removecums = new HashSet<Cum>(cums.Count);
             foreach (Cum cum in cums)
             {
                 float vd = cum.DismishForce(portion);
@@ -1079,8 +1079,8 @@ namespace RJW_Menstruation
             if (cums.NullOrEmpty()) return null;
             Color color = GetCumMixtureColor;
             float totalleak = 0;
-            List<string> cumlabels = new List<string>();
-            HashSet<Cum> removecums = new HashSet<Cum>();
+            List<string> cumlabels = new List<string>(cums.Count);
+            HashSet<Cum> removecums = new HashSet<Cum>(cums.Count);
             bool pure = true;
             foreach (Cum cum in cums)
             {
@@ -1370,7 +1370,7 @@ namespace RJW_Menstruation
         {
             if (eggs.NullOrEmpty()) return false;
 
-            HashSet<Egg> deadeggs = new HashSet<Egg>();
+            HashSet<Egg> deadeggs = new HashSet<Egg>(eggs.Count);
             bool pregnant = false;
             foreach (Egg egg in eggs)
             {
@@ -1574,7 +1574,7 @@ namespace RJW_Menstruation
 
         protected void EggDecay()
         {
-            HashSet<Egg> deadeggs = new HashSet<Egg>();
+            HashSet<Egg> deadeggs = new HashSet<Egg>(eggs.Count);
             foreach (Egg egg in eggs)
             {
                 egg.ageTicks += TickInterval * Configurations.CycleAcceleration;

1.5/source/RJW_Menstruation/RJW_Menstruation/Hediff_MultiplePregnancy.cs

@@ -87,14 +87,10 @@ namespace RJW_Menstruation
             PawnUtility.TrySpawnHatchedOrBornPawn(baby, mother);
 
             Need_Sex sex_need = mother.needs?.TryGetNeed<Need_Sex>();
-            if (mother.Faction != null && !(mother.Faction?.IsPlayer ?? false) && sex_need != null)
-            {
-                sex_need.CurLevel = 1.0f;
-            }
             if (mother.Faction != null)
             {
-                if (mother.Faction != baby.Faction)
-                    baby.SetFaction(mother.Faction);
+                if (!mother.Faction.IsPlayer && sex_need != null) sex_need.CurLevel = 1.0f;
+                if (mother.Faction != baby.Faction) baby.SetFaction(mother.Faction);
             }
             if (mother.IsSlaveOfColony)
             {
@@ -149,14 +145,10 @@ namespace RJW_Menstruation
             PawnUtility.TrySpawnHatchedOrBornPawn(baby, mother);
 
             Need_Sex sex_need = mother.needs?.TryGetNeed<Need_Sex>();
-            if (mother.Faction != null && !(mother.Faction?.IsPlayer ?? false) && sex_need != null)
-            {
-                sex_need.CurLevel = 1.0f;
-            }
             if (mother.Faction != null)
             {
-                if (mother.Faction != baby.Faction)
-                    baby.SetFaction(mother.Faction);
+                if (!mother.Faction.IsPlayer && sex_need != null) sex_need.CurLevel = 1.0f;
+                if (mother.Faction != baby.Faction) baby.SetFaction(mother.Faction);
             }
 
             Train(baby, mother);

1.5/source/RJW_Menstruation/RJW_Menstruation/PregnancyCommon.cs

@@ -217,7 +217,7 @@ namespace RJW_Menstruation
 
             if (info != null)
             {
-                res = info.GetHybridWith(opposite.def.defName) ?? null;
+                res = info.GetHybridWith(opposite.def.defName);
             }
             if (res != null) return res;
 
@@ -226,14 +226,14 @@ namespace RJW_Menstruation
             dna = first.def.GetModExtension<PawnDNAModExtension>();
             if (dna != null)
             {
-                res = dna.GetHybridWith(second.def.defName) ?? null;
+                res = dna.GetHybridWith(second.def.defName);
             }
             else
             {
                 dna = second.def.GetModExtension<PawnDNAModExtension>();
                 if (dna != null)
                 {
-                    res = dna.GetHybridWith(first.def.defName) ?? null;
+                    res = dna.GetHybridWith(first.def.defName);
                 }
             }
             return res;

1.5/source/RJW_Menstruation/RJW_Menstruation/Things.cs

@@ -25,7 +25,7 @@ namespace RJW_Menstruation
 
         public PawnKindDef GetHybridWith(string race)
         {
-            return GetHybridExtension(race)?.ChooseOne() ?? null;
+            return GetHybridExtension(race)?.ChooseOne();
         }
     }
 
@@ -128,7 +128,7 @@ namespace RJW_Menstruation
 
         public PawnKindDef GetHybridWith(string race)
         {
-            return GetHybridExtension(race)?.ChooseOne() ?? null;
+            return GetHybridExtension(race)?.ChooseOne();
         }
 
         public void ExposeData()